./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe008_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe008_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:18:37,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:18:37,752 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:18:37,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:18:37,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:18:37,787 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:18:37,788 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:18:37,789 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:18:37,789 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:18:37,793 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:18:37,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:18:37,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:18:37,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:18:37,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:18:37,796 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:18:37,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:18:37,797 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:18:37,797 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:18:37,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:18:37,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:18:37,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:18:37,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:18:37,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:18:37,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:18:37,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:18:37,799 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:18:37,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:18:37,800 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:18:37,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:18:37,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:18:37,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:18:37,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:18:37,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:37,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:18:37,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:18:37,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:18:37,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:18:37,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:18:37,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:18:37,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:18:37,804 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:18:37,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:18:37,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:18:37,804 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:18:38,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:18:38,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:18:38,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:18:38,108 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:18:38,109 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:18:38,110 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe008_tso.yml/witness.yml [2024-06-27 19:18:38,199 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:18:38,200 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:18:38,200 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-27 19:18:39,376 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:18:39,636 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:18:39,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2024-06-27 19:18:39,662 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f54ce98/cce5e36b02244af59e659570b1958df6/FLAG1f372eefe [2024-06-27 19:18:39,675 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f54ce98/cce5e36b02244af59e659570b1958df6 [2024-06-27 19:18:39,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:18:39,676 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:18:39,677 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:39,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:18:39,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:18:39,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:38" (1/2) ... [2024-06-27 19:18:39,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107e3714 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:39, skipping insertion in model container [2024-06-27 19:18:39,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:38" (1/2) ... [2024-06-27 19:18:39,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@17ca4527 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:18:39, skipping insertion in model container [2024-06-27 19:18:39,686 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:39" (2/2) ... [2024-06-27 19:18:39,687 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@107e3714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:39, skipping insertion in model container [2024-06-27 19:18:39,687 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:18:39" (2/2) ... [2024-06-27 19:18:39,687 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:18:39,740 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:18:39,742 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:18:39,742 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:18:39,742 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 19:18:39,742 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:18:39,742 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-27 19:18:39,786 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:18:40,151 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:40,161 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:18:40,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:18:40,277 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:18:40,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40 WrapperNode [2024-06-27 19:18:40,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:18:40,279 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:40,279 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:18:40,279 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:18:40,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,327 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-27 19:18:40,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:18:40,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:18:40,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:18:40,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:18:40,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,340 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,352 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:18:40,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,363 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,370 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:18:40,371 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:18:40,371 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:18:40,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:18:40,372 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (1/1) ... [2024-06-27 19:18:40,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:18:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:18:40,400 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:18:40,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:18:40,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:18:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:18:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:18:40,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:18:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:18:40,429 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:18:40,429 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:18:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:18:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:18:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:18:40,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:18:40,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:18:40,431 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:18:40,528 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:18:40,531 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:18:40,719 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:18:40,720 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:18:40,811 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:18:40,811 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:18:40,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:40 BoogieIcfgContainer [2024-06-27 19:18:40,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:18:40,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:18:40,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:18:40,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:18:40,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:18:38" (1/4) ... [2024-06-27 19:18:40,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655a10b3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:18:40, skipping insertion in model container [2024-06-27 19:18:40,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:18:39" (2/4) ... [2024-06-27 19:18:40,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655a10b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:18:40, skipping insertion in model container [2024-06-27 19:18:40,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:18:40" (3/4) ... [2024-06-27 19:18:40,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@655a10b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:18:40, skipping insertion in model container [2024-06-27 19:18:40,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:18:40" (4/4) ... [2024-06-27 19:18:40,822 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2024-06-27 19:18:40,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:18:40,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:18:40,841 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:18:40,924 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:18:40,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:40,985 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 19:18:40,985 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:40,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:18:40,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 19:18:40,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 19:18:40,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:18:41,007 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9510d64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:18:41,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:18:41,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:18:41,011 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:18:41,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:18:41,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:41,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:18:41,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:41,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-27 19:18:41,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:41,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989079688] [2024-06-27 19:18:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:41,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989079688] [2024-06-27 19:18:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989079688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:18:41,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464403991] [2024-06-27 19:18:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:41,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:18:41,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:41,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:18:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:18:41,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-27 19:18:41,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:41,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-27 19:18:41,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:41,781 INFO L124 PetriNetUnfolderBase]: 607/1010 cut-off events. [2024-06-27 19:18:41,781 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-06-27 19:18:41,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 1010 events. 607/1010 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4943 event pairs, 393 based on Foata normal form. 1/955 useless extension candidates. Maximal degree in co-relation 2000. Up to 937 conditions per place. [2024-06-27 19:18:41,800 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-27 19:18:41,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-27 19:18:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:18:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:18:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-27 19:18:41,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-27 19:18:41,815 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-27 19:18:41,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-27 19:18:41,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:41,820 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:41,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-27 19:18:41,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 19:18:41,826 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 19:18:41,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:41,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:41,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:41,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:18:41,827 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:41,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 899799369, now seen corresponding path program 1 times [2024-06-27 19:18:41,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:41,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733718149] [2024-06-27 19:18:41,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:41,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:41,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733718149] [2024-06-27 19:18:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733718149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:41,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:41,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:18:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496644283] [2024-06-27 19:18:41,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:41,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:18:41,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:18:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:18:42,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-27 19:18:42,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-27 19:18:42,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:42,174 INFO L124 PetriNetUnfolderBase]: 608/1023 cut-off events. [2024-06-27 19:18:42,175 INFO L125 PetriNetUnfolderBase]: For 186/192 co-relation queries the response was YES. [2024-06-27 19:18:42,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2342 conditions, 1023 events. 608/1023 cut-off events. For 186/192 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4980 event pairs, 321 based on Foata normal form. 8/1026 useless extension candidates. Maximal degree in co-relation 2330. Up to 911 conditions per place. [2024-06-27 19:18:42,183 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 37 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-27 19:18:42,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 258 flow [2024-06-27 19:18:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:42,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-27 19:18:42,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-06-27 19:18:42,188 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 113 transitions. [2024-06-27 19:18:42,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 258 flow [2024-06-27 19:18:42,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:42,191 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-27 19:18:42,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-27 19:18:42,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 19:18:42,192 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-27 19:18:42,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:42,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:42,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:18:42,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:42,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:42,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2123977079, now seen corresponding path program 1 times [2024-06-27 19:18:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:42,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657000219] [2024-06-27 19:18:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657000219] [2024-06-27 19:18:42,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657000219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:42,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616764267] [2024-06-27 19:18:42,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:42,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:42,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:42,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:42,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:42,537 INFO L124 PetriNetUnfolderBase]: 775/1261 cut-off events. [2024-06-27 19:18:42,537 INFO L125 PetriNetUnfolderBase]: For 881/889 co-relation queries the response was YES. [2024-06-27 19:18:42,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3463 conditions, 1261 events. 775/1261 cut-off events. For 881/889 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6139 event pairs, 289 based on Foata normal form. 10/1266 useless extension candidates. Maximal degree in co-relation 3448. Up to 1131 conditions per place. [2024-06-27 19:18:42,547 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 15 changer transitions 0/80 dead transitions. [2024-06-27 19:18:42,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 446 flow [2024-06-27 19:18:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-27 19:18:42,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.685 [2024-06-27 19:18:42,553 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 137 transitions. [2024-06-27 19:18:42,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 446 flow [2024-06-27 19:18:42,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 440 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:42,559 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 303 flow [2024-06-27 19:18:42,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=303, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-27 19:18:42,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-27 19:18:42,560 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 303 flow [2024-06-27 19:18:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:42,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:42,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:18:42,561 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:42,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1032521654, now seen corresponding path program 1 times [2024-06-27 19:18:42,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216595519] [2024-06-27 19:18:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:42,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:42,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:42,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216595519] [2024-06-27 19:18:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216595519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:42,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:42,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333031176] [2024-06-27 19:18:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:42,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:42,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:42,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:42,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:42,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 303 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:42,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:42,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:42,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,043 INFO L124 PetriNetUnfolderBase]: 804/1306 cut-off events. [2024-06-27 19:18:43,044 INFO L125 PetriNetUnfolderBase]: For 1684/1697 co-relation queries the response was YES. [2024-06-27 19:18:43,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 1306 events. 804/1306 cut-off events. For 1684/1697 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6394 event pairs, 246 based on Foata normal form. 23/1324 useless extension candidates. Maximal degree in co-relation 4096. Up to 1104 conditions per place. [2024-06-27 19:18:43,054 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-27 19:18:43,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 564 flow [2024-06-27 19:18:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 19:18:43,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-06-27 19:18:43,056 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 303 flow. Second operand 6 states and 161 transitions. [2024-06-27 19:18:43,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 564 flow [2024-06-27 19:18:43,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 558 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:43,062 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 347 flow [2024-06-27 19:18:43,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-27 19:18:43,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-27 19:18:43,063 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 347 flow [2024-06-27 19:18:43,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:43,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:18:43,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:43,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1088277451, now seen corresponding path program 1 times [2024-06-27 19:18:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66245450] [2024-06-27 19:18:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66245450] [2024-06-27 19:18:43,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66245450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:43,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140727525] [2024-06-27 19:18:43,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:43,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:43,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:43,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:43,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:43,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,420 INFO L124 PetriNetUnfolderBase]: 949/1559 cut-off events. [2024-06-27 19:18:43,420 INFO L125 PetriNetUnfolderBase]: For 2613/2613 co-relation queries the response was YES. [2024-06-27 19:18:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5137 conditions, 1559 events. 949/1559 cut-off events. For 2613/2613 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7815 event pairs, 364 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 5114. Up to 1424 conditions per place. [2024-06-27 19:18:43,434 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 61 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-06-27 19:18:43,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 563 flow [2024-06-27 19:18:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:43,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 19:18:43,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:18:43,437 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 347 flow. Second operand 4 states and 99 transitions. [2024-06-27 19:18:43,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 563 flow [2024-06-27 19:18:43,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 523 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:43,446 INFO L231 Difference]: Finished difference. Result has 58 places, 64 transitions, 393 flow [2024-06-27 19:18:43,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=393, PETRI_PLACES=58, PETRI_TRANSITIONS=64} [2024-06-27 19:18:43,448 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-27 19:18:43,448 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 64 transitions, 393 flow [2024-06-27 19:18:43,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:18:43,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:43,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-27 19:18:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449987089] [2024-06-27 19:18:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449987089] [2024-06-27 19:18:43,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449987089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267466550] [2024-06-27 19:18:43,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:43,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:43,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 64 transitions, 393 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:43,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:43,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:43,824 INFO L124 PetriNetUnfolderBase]: 942/1529 cut-off events. [2024-06-27 19:18:43,824 INFO L125 PetriNetUnfolderBase]: For 3732/3768 co-relation queries the response was YES. [2024-06-27 19:18:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5509 conditions, 1529 events. 942/1529 cut-off events. For 3732/3768 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7829 event pairs, 225 based on Foata normal form. 13/1527 useless extension candidates. Maximal degree in co-relation 5484. Up to 1275 conditions per place. [2024-06-27 19:18:43,837 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2024-06-27 19:18:43,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 103 transitions, 747 flow [2024-06-27 19:18:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:43,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 19:18:43,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-06-27 19:18:43,839 INFO L175 Difference]: Start difference. First operand has 58 places, 64 transitions, 393 flow. Second operand 6 states and 163 transitions. [2024-06-27 19:18:43,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 103 transitions, 747 flow [2024-06-27 19:18:43,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 103 transitions, 743 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-27 19:18:43,847 INFO L231 Difference]: Finished difference. Result has 64 places, 75 transitions, 546 flow [2024-06-27 19:18:43,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=64, PETRI_TRANSITIONS=75} [2024-06-27 19:18:43,848 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-27 19:18:43,848 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 75 transitions, 546 flow [2024-06-27 19:18:43,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:43,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:43,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:43,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:18:43,849 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash 187307678, now seen corresponding path program 1 times [2024-06-27 19:18:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119995047] [2024-06-27 19:18:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:43,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:43,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119995047] [2024-06-27 19:18:43,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119995047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:43,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089060392] [2024-06-27 19:18:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:43,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:43,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:44,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:44,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 75 transitions, 546 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:44,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:44,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,240 INFO L124 PetriNetUnfolderBase]: 1002/1652 cut-off events. [2024-06-27 19:18:44,241 INFO L125 PetriNetUnfolderBase]: For 4884/4884 co-relation queries the response was YES. [2024-06-27 19:18:44,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6288 conditions, 1652 events. 1002/1652 cut-off events. For 4884/4884 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8403 event pairs, 335 based on Foata normal form. 2/1649 useless extension candidates. Maximal degree in co-relation 6260. Up to 1442 conditions per place. [2024-06-27 19:18:44,255 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 87 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-27 19:18:44,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 113 transitions, 923 flow [2024-06-27 19:18:44,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:44,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:18:44,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-27 19:18:44,258 INFO L175 Difference]: Start difference. First operand has 64 places, 75 transitions, 546 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:18:44,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 113 transitions, 923 flow [2024-06-27 19:18:44,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 883 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:44,270 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 649 flow [2024-06-27 19:18:44,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=649, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2024-06-27 19:18:44,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-27 19:18:44,271 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 649 flow [2024-06-27 19:18:44,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:44,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:44,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:18:44,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:44,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1104153096, now seen corresponding path program 2 times [2024-06-27 19:18:44,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:44,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787506276] [2024-06-27 19:18:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:44,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:44,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787506276] [2024-06-27 19:18:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787506276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:44,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060844965] [2024-06-27 19:18:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:44,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:44,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:44,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:44,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 649 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:44,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:44,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:44,692 INFO L124 PetriNetUnfolderBase]: 967/1592 cut-off events. [2024-06-27 19:18:44,692 INFO L125 PetriNetUnfolderBase]: For 6650/6754 co-relation queries the response was YES. [2024-06-27 19:18:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6626 conditions, 1592 events. 967/1592 cut-off events. For 6650/6754 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8171 event pairs, 268 based on Foata normal form. 17/1563 useless extension candidates. Maximal degree in co-relation 6593. Up to 1352 conditions per place. [2024-06-27 19:18:44,707 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 72 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2024-06-27 19:18:44,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 119 transitions, 1003 flow [2024-06-27 19:18:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:18:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-27 19:18:44,709 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 649 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:18:44,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 119 transitions, 1003 flow [2024-06-27 19:18:44,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 119 transitions, 975 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:44,726 INFO L231 Difference]: Finished difference. Result has 75 places, 95 transitions, 772 flow [2024-06-27 19:18:44,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=772, PETRI_PLACES=75, PETRI_TRANSITIONS=95} [2024-06-27 19:18:44,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-27 19:18:44,729 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 95 transitions, 772 flow [2024-06-27 19:18:44,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:44,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:44,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:18:44,729 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:44,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:44,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1409729370, now seen corresponding path program 3 times [2024-06-27 19:18:44,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:44,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229595039] [2024-06-27 19:18:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:44,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:44,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229595039] [2024-06-27 19:18:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229595039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:44,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:44,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909506587] [2024-06-27 19:18:44,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:44,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:44,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:44,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:44,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 95 transitions, 772 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:44,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:44,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:44,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:45,151 INFO L124 PetriNetUnfolderBase]: 962/1586 cut-off events. [2024-06-27 19:18:45,151 INFO L125 PetriNetUnfolderBase]: For 7755/7841 co-relation queries the response was YES. [2024-06-27 19:18:45,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6832 conditions, 1586 events. 962/1586 cut-off events. For 7755/7841 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8135 event pairs, 267 based on Foata normal form. 17/1558 useless extension candidates. Maximal degree in co-relation 6798. Up to 1294 conditions per place. [2024-06-27 19:18:45,169 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 64 selfloop transitions, 46 changer transitions 0/123 dead transitions. [2024-06-27 19:18:45,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 123 transitions, 1111 flow [2024-06-27 19:18:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:45,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:18:45,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 19:18:45,173 INFO L175 Difference]: Start difference. First operand has 75 places, 95 transitions, 772 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:18:45,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 123 transitions, 1111 flow [2024-06-27 19:18:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 123 transitions, 1023 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:45,220 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 843 flow [2024-06-27 19:18:45,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=843, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-06-27 19:18:45,220 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-27 19:18:45,221 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 843 flow [2024-06-27 19:18:45,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:45,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:45,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:18:45,221 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:45,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1409492034, now seen corresponding path program 2 times [2024-06-27 19:18:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:45,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436608672] [2024-06-27 19:18:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436608672] [2024-06-27 19:18:45,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436608672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013658243] [2024-06-27 19:18:45,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:45,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:45,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:45,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 843 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:45,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:45,627 INFO L124 PetriNetUnfolderBase]: 1047/1732 cut-off events. [2024-06-27 19:18:45,627 INFO L125 PetriNetUnfolderBase]: For 8922/8932 co-relation queries the response was YES. [2024-06-27 19:18:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7489 conditions, 1732 events. 1047/1732 cut-off events. For 8922/8932 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8869 event pairs, 344 based on Foata normal form. 10/1736 useless extension candidates. Maximal degree in co-relation 7453. Up to 1503 conditions per place. [2024-06-27 19:18:45,641 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-27 19:18:45,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1190 flow [2024-06-27 19:18:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-27 19:18:45,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 19:18:45,643 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 843 flow. Second operand 5 states and 124 transitions. [2024-06-27 19:18:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1190 flow [2024-06-27 19:18:45,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 1092 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:45,656 INFO L231 Difference]: Finished difference. Result has 81 places, 104 transitions, 845 flow [2024-06-27 19:18:45,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=81, PETRI_TRANSITIONS=104} [2024-06-27 19:18:45,657 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-27 19:18:45,657 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 104 transitions, 845 flow [2024-06-27 19:18:45,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:45,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:45,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:18:45,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:45,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1409729184, now seen corresponding path program 3 times [2024-06-27 19:18:45,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:45,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628166704] [2024-06-27 19:18:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:45,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:45,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:45,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628166704] [2024-06-27 19:18:45,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628166704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:45,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:45,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:45,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479218030] [2024-06-27 19:18:45,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:45,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:45,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:45,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:45,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 104 transitions, 845 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,045 INFO L124 PetriNetUnfolderBase]: 1042/1720 cut-off events. [2024-06-27 19:18:46,046 INFO L125 PetriNetUnfolderBase]: For 8144/8144 co-relation queries the response was YES. [2024-06-27 19:18:46,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7376 conditions, 1720 events. 1042/1720 cut-off events. For 8144/8144 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8805 event pairs, 333 based on Foata normal form. 2/1717 useless extension candidates. Maximal degree in co-relation 7338. Up to 1498 conditions per place. [2024-06-27 19:18:46,061 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-27 19:18:46,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 1130 flow [2024-06-27 19:18:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 19:18:46,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 19:18:46,063 INFO L175 Difference]: Start difference. First operand has 81 places, 104 transitions, 845 flow. Second operand 5 states and 126 transitions. [2024-06-27 19:18:46,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 1130 flow [2024-06-27 19:18:46,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 1104 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 19:18:46,085 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 877 flow [2024-06-27 19:18:46,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=877, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2024-06-27 19:18:46,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-27 19:18:46,086 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 877 flow [2024-06-27 19:18:46,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:46,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:18:46,087 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:46,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1409483106, now seen corresponding path program 1 times [2024-06-27 19:18:46,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625880783] [2024-06-27 19:18:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:46,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:46,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625880783] [2024-06-27 19:18:46,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625880783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:46,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:46,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:18:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616673784] [2024-06-27 19:18:46,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:18:46,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:46,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:18:46,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:18:46,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:46,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 877 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:46,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:46,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,475 INFO L124 PetriNetUnfolderBase]: 1034/1709 cut-off events. [2024-06-27 19:18:46,476 INFO L125 PetriNetUnfolderBase]: For 9403/9406 co-relation queries the response was YES. [2024-06-27 19:18:46,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7456 conditions, 1709 events. 1034/1709 cut-off events. For 9403/9406 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8739 event pairs, 313 based on Foata normal form. 6/1712 useless extension candidates. Maximal degree in co-relation 7416. Up to 1528 conditions per place. [2024-06-27 19:18:46,488 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 106 selfloop transitions, 10 changer transitions 0/123 dead transitions. [2024-06-27 19:18:46,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 1168 flow [2024-06-27 19:18:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:18:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:18:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:18:46,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:18:46,490 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 877 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:18:46,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 1168 flow [2024-06-27 19:18:46,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 1123 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:46,509 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 875 flow [2024-06-27 19:18:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 19:18:46,511 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-27 19:18:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 875 flow [2024-06-27 19:18:46,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:46,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:18:46,512 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:46,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1507847178, now seen corresponding path program 1 times [2024-06-27 19:18:46,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189661081] [2024-06-27 19:18:46,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189661081] [2024-06-27 19:18:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189661081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:46,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:46,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70992364] [2024-06-27 19:18:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:46,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:46,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:46,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:46,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:46,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:46,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 875 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:46,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:46,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:46,915 INFO L124 PetriNetUnfolderBase]: 1045/1723 cut-off events. [2024-06-27 19:18:46,916 INFO L125 PetriNetUnfolderBase]: For 9506/9506 co-relation queries the response was YES. [2024-06-27 19:18:46,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7575 conditions, 1723 events. 1045/1723 cut-off events. For 9506/9506 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8680 event pairs, 308 based on Foata normal form. 2/1720 useless extension candidates. Maximal degree in co-relation 7535. Up to 1420 conditions per place. [2024-06-27 19:18:46,927 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 34 changer transitions 0/153 dead transitions. [2024-06-27 19:18:46,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 153 transitions, 1393 flow [2024-06-27 19:18:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:46,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:18:46,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:46,929 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 875 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:18:46,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 153 transitions, 1393 flow [2024-06-27 19:18:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 153 transitions, 1368 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:46,955 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1048 flow [2024-06-27 19:18:46,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1048, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-27 19:18:46,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 19:18:46,956 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1048 flow [2024-06-27 19:18:46,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:46,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:46,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:46,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:18:46,957 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:46,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:46,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1511566248, now seen corresponding path program 2 times [2024-06-27 19:18:46,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:46,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174453963] [2024-06-27 19:18:46,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:46,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:47,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174453963] [2024-06-27 19:18:47,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174453963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:47,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:47,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014910187] [2024-06-27 19:18:47,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:47,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:47,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:47,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:47,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1048 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:47,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:47,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:47,451 INFO L124 PetriNetUnfolderBase]: 1072/1772 cut-off events. [2024-06-27 19:18:47,452 INFO L125 PetriNetUnfolderBase]: For 11562/11562 co-relation queries the response was YES. [2024-06-27 19:18:47,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8291 conditions, 1772 events. 1072/1772 cut-off events. For 11562/11562 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9035 event pairs, 308 based on Foata normal form. 2/1769 useless extension candidates. Maximal degree in co-relation 8248. Up to 1512 conditions per place. [2024-06-27 19:18:47,467 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 30 changer transitions 0/155 dead transitions. [2024-06-27 19:18:47,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 155 transitions, 1526 flow [2024-06-27 19:18:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:18:47,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:18:47,469 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1048 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:18:47,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 155 transitions, 1526 flow [2024-06-27 19:18:47,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 155 transitions, 1474 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:47,493 INFO L231 Difference]: Finished difference. Result has 98 places, 126 transitions, 1140 flow [2024-06-27 19:18:47,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1140, PETRI_PLACES=98, PETRI_TRANSITIONS=126} [2024-06-27 19:18:47,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-27 19:18:47,494 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 126 transitions, 1140 flow [2024-06-27 19:18:47,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:47,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:18:47,495 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:47,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash -130985520, now seen corresponding path program 3 times [2024-06-27 19:18:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:47,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319446018] [2024-06-27 19:18:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:47,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319446018] [2024-06-27 19:18:47,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319446018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:47,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:47,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:47,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697207793] [2024-06-27 19:18:47,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:47,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:47,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:47,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 126 transitions, 1140 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:47,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:47,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:47,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:48,017 INFO L124 PetriNetUnfolderBase]: 1067/1765 cut-off events. [2024-06-27 19:18:48,017 INFO L125 PetriNetUnfolderBase]: For 12838/12838 co-relation queries the response was YES. [2024-06-27 19:18:48,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8473 conditions, 1765 events. 1067/1765 cut-off events. For 12838/12838 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8972 event pairs, 308 based on Foata normal form. 2/1762 useless extension candidates. Maximal degree in co-relation 8427. Up to 1507 conditions per place. [2024-06-27 19:18:48,033 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 123 selfloop transitions, 32 changer transitions 0/162 dead transitions. [2024-06-27 19:18:48,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 1553 flow [2024-06-27 19:18:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:18:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:18:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-27 19:18:48,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:18:48,035 INFO L175 Difference]: Start difference. First operand has 98 places, 126 transitions, 1140 flow. Second operand 9 states and 210 transitions. [2024-06-27 19:18:48,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 1553 flow [2024-06-27 19:18:48,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1511 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:48,064 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 1180 flow [2024-06-27 19:18:48,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2024-06-27 19:18:48,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 19:18:48,065 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 1180 flow [2024-06-27 19:18:48,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:48,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:48,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:18:48,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:48,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:48,067 INFO L85 PathProgramCache]: Analyzing trace with hash -197823618, now seen corresponding path program 4 times [2024-06-27 19:18:48,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:48,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096709350] [2024-06-27 19:18:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:48,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:48,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:48,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096709350] [2024-06-27 19:18:48,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096709350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:48,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:48,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995028319] [2024-06-27 19:18:48,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:48,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:48,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:48,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:48,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:48,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:48,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:48,553 INFO L124 PetriNetUnfolderBase]: 1078/1786 cut-off events. [2024-06-27 19:18:48,553 INFO L125 PetriNetUnfolderBase]: For 14353/14353 co-relation queries the response was YES. [2024-06-27 19:18:48,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8779 conditions, 1786 events. 1078/1786 cut-off events. For 14353/14353 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9131 event pairs, 308 based on Foata normal form. 2/1783 useless extension candidates. Maximal degree in co-relation 8731. Up to 1474 conditions per place. [2024-06-27 19:18:48,571 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 40 changer transitions 0/159 dead transitions. [2024-06-27 19:18:48,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 159 transitions, 1647 flow [2024-06-27 19:18:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:18:48,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 19:18:48,573 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 1180 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:18:48,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 159 transitions, 1647 flow [2024-06-27 19:18:48,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 159 transitions, 1581 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:48,603 INFO L231 Difference]: Finished difference. Result has 104 places, 131 transitions, 1263 flow [2024-06-27 19:18:48,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1263, PETRI_PLACES=104, PETRI_TRANSITIONS=131} [2024-06-27 19:18:48,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 19:18:48,604 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 131 transitions, 1263 flow [2024-06-27 19:18:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:48,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:48,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:18:48,605 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:48,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:48,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1035551628, now seen corresponding path program 5 times [2024-06-27 19:18:48,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:48,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239622585] [2024-06-27 19:18:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:48,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:48,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239622585] [2024-06-27 19:18:48,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239622585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:48,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:48,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:48,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970449835] [2024-06-27 19:18:48,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:48,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:48,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:48,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:48,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:48,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 131 transitions, 1263 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:48,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:48,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:48,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,065 INFO L124 PetriNetUnfolderBase]: 1089/1807 cut-off events. [2024-06-27 19:18:49,066 INFO L125 PetriNetUnfolderBase]: For 16354/16354 co-relation queries the response was YES. [2024-06-27 19:18:49,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 1807 events. 1089/1807 cut-off events. For 16354/16354 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9285 event pairs, 308 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 9104. Up to 1486 conditions per place. [2024-06-27 19:18:49,083 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2024-06-27 19:18:49,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 170 transitions, 1778 flow [2024-06-27 19:18:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:18:49,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:18:49,085 INFO L175 Difference]: Start difference. First operand has 104 places, 131 transitions, 1263 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:18:49,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 170 transitions, 1778 flow [2024-06-27 19:18:49,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 170 transitions, 1676 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:49,124 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1305 flow [2024-06-27 19:18:49,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1305, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-27 19:18:49,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 19:18:49,125 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1305 flow [2024-06-27 19:18:49,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:49,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:49,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:18:49,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:49,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash -751728828, now seen corresponding path program 6 times [2024-06-27 19:18:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:49,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527279124] [2024-06-27 19:18:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:49,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:49,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527279124] [2024-06-27 19:18:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527279124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:49,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:49,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978342188] [2024-06-27 19:18:49,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:49,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:49,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:49,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:49,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:49,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1305 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:49,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:49,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,580 INFO L124 PetriNetUnfolderBase]: 1084/1805 cut-off events. [2024-06-27 19:18:49,581 INFO L125 PetriNetUnfolderBase]: For 16723/16735 co-relation queries the response was YES. [2024-06-27 19:18:49,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9100 conditions, 1805 events. 1084/1805 cut-off events. For 16723/16735 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9341 event pairs, 319 based on Foata normal form. 12/1811 useless extension candidates. Maximal degree in co-relation 9050. Up to 1481 conditions per place. [2024-06-27 19:18:49,595 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 45 changer transitions 0/166 dead transitions. [2024-06-27 19:18:49,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 166 transitions, 1718 flow [2024-06-27 19:18:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:18:49,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:18:49,598 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1305 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:18:49,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 166 transitions, 1718 flow [2024-06-27 19:18:49,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 166 transitions, 1604 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:18:49,631 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1301 flow [2024-06-27 19:18:49,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1301, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-27 19:18:49,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-27 19:18:49,632 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1301 flow [2024-06-27 19:18:49,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:49,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:49,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:18:49,632 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:49,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:49,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-27 19:18:49,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:49,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875305430] [2024-06-27 19:18:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:49,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875305430] [2024-06-27 19:18:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875305430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:49,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:49,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:18:49,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317935278] [2024-06-27 19:18:49,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:18:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:18:49,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:18:49,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:49,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1301 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:49,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:49,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:49,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:49,966 INFO L124 PetriNetUnfolderBase]: 994/1646 cut-off events. [2024-06-27 19:18:49,966 INFO L125 PetriNetUnfolderBase]: For 16572/16590 co-relation queries the response was YES. [2024-06-27 19:18:49,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8420 conditions, 1646 events. 994/1646 cut-off events. For 16572/16590 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8453 event pairs, 302 based on Foata normal form. 19/1644 useless extension candidates. Maximal degree in co-relation 8370. Up to 1400 conditions per place. [2024-06-27 19:18:49,982 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 102 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-27 19:18:49,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 143 transitions, 1577 flow [2024-06-27 19:18:49,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:18:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:18:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 19:18:49,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-27 19:18:49,983 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1301 flow. Second operand 4 states and 101 transitions. [2024-06-27 19:18:49,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 143 transitions, 1577 flow [2024-06-27 19:18:50,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 143 transitions, 1477 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:50,013 INFO L231 Difference]: Finished difference. Result has 106 places, 135 transitions, 1265 flow [2024-06-27 19:18:50,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1265, PETRI_PLACES=106, PETRI_TRANSITIONS=135} [2024-06-27 19:18:50,014 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-27 19:18:50,014 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 135 transitions, 1265 flow [2024-06-27 19:18:50,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:50,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:50,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:18:50,015 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:50,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:50,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-27 19:18:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:50,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863429807] [2024-06-27 19:18:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:50,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:50,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863429807] [2024-06-27 19:18:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863429807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:50,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:50,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852572810] [2024-06-27 19:18:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:50,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:50,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 135 transitions, 1265 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:50,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:50,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:50,515 INFO L124 PetriNetUnfolderBase]: 1102/1810 cut-off events. [2024-06-27 19:18:50,516 INFO L125 PetriNetUnfolderBase]: For 20905/20921 co-relation queries the response was YES. [2024-06-27 19:18:50,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9267 conditions, 1810 events. 1102/1810 cut-off events. For 20905/20921 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9331 event pairs, 191 based on Foata normal form. 18/1777 useless extension candidates. Maximal degree in co-relation 9216. Up to 1226 conditions per place. [2024-06-27 19:18:50,531 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 90 selfloop transitions, 64 changer transitions 0/179 dead transitions. [2024-06-27 19:18:50,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 179 transitions, 1821 flow [2024-06-27 19:18:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 19:18:50,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6821428571428572 [2024-06-27 19:18:50,533 INFO L175 Difference]: Start difference. First operand has 106 places, 135 transitions, 1265 flow. Second operand 7 states and 191 transitions. [2024-06-27 19:18:50,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 179 transitions, 1821 flow [2024-06-27 19:18:50,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 179 transitions, 1757 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:50,571 INFO L231 Difference]: Finished difference. Result has 110 places, 139 transitions, 1380 flow [2024-06-27 19:18:50,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1380, PETRI_PLACES=110, PETRI_TRANSITIONS=139} [2024-06-27 19:18:50,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 19:18:50,572 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 139 transitions, 1380 flow [2024-06-27 19:18:50,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:50,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:50,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:18:50,573 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:50,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 118948389, now seen corresponding path program 2 times [2024-06-27 19:18:50,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:50,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549296590] [2024-06-27 19:18:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:50,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:50,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549296590] [2024-06-27 19:18:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549296590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:50,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:50,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247767904] [2024-06-27 19:18:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:50,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:50,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:50,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:50,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:50,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 139 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:50,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:50,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:50,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:51,025 INFO L124 PetriNetUnfolderBase]: 1147/1881 cut-off events. [2024-06-27 19:18:51,025 INFO L125 PetriNetUnfolderBase]: For 24439/24462 co-relation queries the response was YES. [2024-06-27 19:18:51,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10037 conditions, 1881 events. 1147/1881 cut-off events. For 24439/24462 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9800 event pairs, 283 based on Foata normal form. 16/1842 useless extension candidates. Maximal degree in co-relation 9986. Up to 1477 conditions per place. [2024-06-27 19:18:51,094 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 62 changer transitions 0/175 dead transitions. [2024-06-27 19:18:51,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 175 transitions, 1832 flow [2024-06-27 19:18:51,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:18:51,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-06-27 19:18:51,096 INFO L175 Difference]: Start difference. First operand has 110 places, 139 transitions, 1380 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:18:51,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 175 transitions, 1832 flow [2024-06-27 19:18:51,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 175 transitions, 1745 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:51,138 INFO L231 Difference]: Finished difference. Result has 114 places, 141 transitions, 1454 flow [2024-06-27 19:18:51,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1454, PETRI_PLACES=114, PETRI_TRANSITIONS=141} [2024-06-27 19:18:51,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 19:18:51,139 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 141 transitions, 1454 flow [2024-06-27 19:18:51,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:51,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:51,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:18:51,140 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:51,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash -386090205, now seen corresponding path program 3 times [2024-06-27 19:18:51,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:51,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961880540] [2024-06-27 19:18:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:51,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961880540] [2024-06-27 19:18:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961880540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:51,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380756839] [2024-06-27 19:18:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:51,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:51,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:51,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 141 transitions, 1454 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:51,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:51,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:51,651 INFO L124 PetriNetUnfolderBase]: 1199/1965 cut-off events. [2024-06-27 19:18:51,652 INFO L125 PetriNetUnfolderBase]: For 27508/27531 co-relation queries the response was YES. [2024-06-27 19:18:51,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10760 conditions, 1965 events. 1199/1965 cut-off events. For 27508/27531 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10309 event pairs, 284 based on Foata normal form. 16/1929 useless extension candidates. Maximal degree in co-relation 10707. Up to 1626 conditions per place. [2024-06-27 19:18:51,671 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 39 changer transitions 0/173 dead transitions. [2024-06-27 19:18:51,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1864 flow [2024-06-27 19:18:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:18:51,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:18:51,674 INFO L175 Difference]: Start difference. First operand has 114 places, 141 transitions, 1454 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:18:51,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1864 flow [2024-06-27 19:18:51,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1735 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:51,717 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1444 flow [2024-06-27 19:18:51,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1444, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-27 19:18:51,718 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-27 19:18:51,718 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1444 flow [2024-06-27 19:18:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:51,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:51,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:18:51,719 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:51,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash -385905507, now seen corresponding path program 1 times [2024-06-27 19:18:51,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:51,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995000673] [2024-06-27 19:18:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:51,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:51,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:51,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995000673] [2024-06-27 19:18:51,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995000673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:51,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:51,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:51,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679528398] [2024-06-27 19:18:51,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:51,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:51,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:51,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:51,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1444 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:51,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:51,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:51,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:52,243 INFO L124 PetriNetUnfolderBase]: 1270/2071 cut-off events. [2024-06-27 19:18:52,243 INFO L125 PetriNetUnfolderBase]: For 25890/25890 co-relation queries the response was YES. [2024-06-27 19:18:52,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11120 conditions, 2071 events. 1270/2071 cut-off events. For 25890/25890 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10810 event pairs, 310 based on Foata normal form. 4/2070 useless extension candidates. Maximal degree in co-relation 11066. Up to 1832 conditions per place. [2024-06-27 19:18:52,265 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 25 changer transitions 0/173 dead transitions. [2024-06-27 19:18:52,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1865 flow [2024-06-27 19:18:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:52,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:52,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 19:18:52,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:18:52,268 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1444 flow. Second operand 7 states and 168 transitions. [2024-06-27 19:18:52,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1865 flow [2024-06-27 19:18:52,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 1778 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:52,320 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1432 flow [2024-06-27 19:18:52,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1432, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-06-27 19:18:52,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 19:18:52,321 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1432 flow [2024-06-27 19:18:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:52,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:52,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:18:52,322 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:52,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:52,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1835189915, now seen corresponding path program 4 times [2024-06-27 19:18:52,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:52,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020763904] [2024-06-27 19:18:52,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:52,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:52,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:52,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020763904] [2024-06-27 19:18:52,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020763904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:52,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:52,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:52,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335437719] [2024-06-27 19:18:52,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:52,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:18:52,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1432 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:52,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:18:52,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:52,817 INFO L124 PetriNetUnfolderBase]: 1183/1947 cut-off events. [2024-06-27 19:18:52,817 INFO L125 PetriNetUnfolderBase]: For 29301/29328 co-relation queries the response was YES. [2024-06-27 19:18:52,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10580 conditions, 1947 events. 1183/1947 cut-off events. For 29301/29328 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10200 event pairs, 184 based on Foata normal form. 24/1921 useless extension candidates. Maximal degree in co-relation 10525. Up to 1438 conditions per place. [2024-06-27 19:18:52,836 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 59 changer transitions 0/176 dead transitions. [2024-06-27 19:18:52,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 176 transitions, 1858 flow [2024-06-27 19:18:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:18:52,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6535714285714286 [2024-06-27 19:18:52,838 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1432 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:18:52,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 176 transitions, 1858 flow [2024-06-27 19:18:52,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 176 transitions, 1793 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:52,887 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1504 flow [2024-06-27 19:18:52,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1504, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-06-27 19:18:52,887 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-27 19:18:52,888 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1504 flow [2024-06-27 19:18:52,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:52,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:52,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:52,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:18:52,888 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:52,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1607104067, now seen corresponding path program 2 times [2024-06-27 19:18:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:52,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809073706] [2024-06-27 19:18:52,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809073706] [2024-06-27 19:18:53,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809073706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715163435] [2024-06-27 19:18:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:53,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:53,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:53,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:53,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1504 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:53,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:53,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:53,336 INFO L124 PetriNetUnfolderBase]: 1256/2058 cut-off events. [2024-06-27 19:18:53,337 INFO L125 PetriNetUnfolderBase]: For 28442/28454 co-relation queries the response was YES. [2024-06-27 19:18:53,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11201 conditions, 2058 events. 1256/2058 cut-off events. For 28442/28454 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10830 event pairs, 317 based on Foata normal form. 14/2066 useless extension candidates. Maximal degree in co-relation 11145. Up to 1814 conditions per place. [2024-06-27 19:18:53,354 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 137 selfloop transitions, 24 changer transitions 0/168 dead transitions. [2024-06-27 19:18:53,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 168 transitions, 1901 flow [2024-06-27 19:18:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:18:53,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:18:53,355 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1504 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:18:53,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 168 transitions, 1901 flow [2024-06-27 19:18:53,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 168 transitions, 1770 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:53,403 INFO L231 Difference]: Finished difference. Result has 120 places, 147 transitions, 1450 flow [2024-06-27 19:18:53,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1450, PETRI_PLACES=120, PETRI_TRANSITIONS=147} [2024-06-27 19:18:53,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-27 19:18:53,404 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 147 transitions, 1450 flow [2024-06-27 19:18:53,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:53,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:18:53,405 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1828510097, now seen corresponding path program 3 times [2024-06-27 19:18:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395947278] [2024-06-27 19:18:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:53,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395947278] [2024-06-27 19:18:53,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395947278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:53,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:53,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:53,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544958303] [2024-06-27 19:18:53,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:53,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:53,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:53,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:53,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:53,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 147 transitions, 1450 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:53,836 INFO L124 PetriNetUnfolderBase]: 1273/2085 cut-off events. [2024-06-27 19:18:53,836 INFO L125 PetriNetUnfolderBase]: For 27791/27803 co-relation queries the response was YES. [2024-06-27 19:18:53,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11213 conditions, 2085 events. 1273/2085 cut-off events. For 27791/27803 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10996 event pairs, 288 based on Foata normal form. 14/2093 useless extension candidates. Maximal degree in co-relation 11156. Up to 1758 conditions per place. [2024-06-27 19:18:53,853 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 137 selfloop transitions, 31 changer transitions 0/175 dead transitions. [2024-06-27 19:18:53,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1971 flow [2024-06-27 19:18:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:18:53,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:18:53,855 INFO L175 Difference]: Start difference. First operand has 120 places, 147 transitions, 1450 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:18:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1971 flow [2024-06-27 19:18:53,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1912 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:53,908 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1508 flow [2024-06-27 19:18:53,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1508, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2024-06-27 19:18:53,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-27 19:18:53,909 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1508 flow [2024-06-27 19:18:53,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:53,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:53,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:53,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:18:53,910 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:53,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:53,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1837383801, now seen corresponding path program 4 times [2024-06-27 19:18:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031303805] [2024-06-27 19:18:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:53,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031303805] [2024-06-27 19:18:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031303805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:54,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:54,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:18:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508733530] [2024-06-27 19:18:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:18:54,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:18:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:18:54,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:54,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1508 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:54,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:54,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:54,370 INFO L124 PetriNetUnfolderBase]: 1265/2068 cut-off events. [2024-06-27 19:18:54,370 INFO L125 PetriNetUnfolderBase]: For 29054/29054 co-relation queries the response was YES. [2024-06-27 19:18:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 2068 events. 1265/2068 cut-off events. For 29054/29054 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10819 event pairs, 302 based on Foata normal form. 4/2067 useless extension candidates. Maximal degree in co-relation 11242. Up to 1811 conditions per place. [2024-06-27 19:18:54,385 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 141 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2024-06-27 19:18:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 175 transitions, 1909 flow [2024-06-27 19:18:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:18:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:18:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-27 19:18:54,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:18:54,387 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1508 flow. Second operand 6 states and 147 transitions. [2024-06-27 19:18:54,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 175 transitions, 1909 flow [2024-06-27 19:18:54,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1859 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:18:54,439 INFO L231 Difference]: Finished difference. Result has 126 places, 151 transitions, 1522 flow [2024-06-27 19:18:54,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1522, PETRI_PLACES=126, PETRI_TRANSITIONS=151} [2024-06-27 19:18:54,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 19:18:54,441 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 151 transitions, 1522 flow [2024-06-27 19:18:54,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:54,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:54,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:18:54,441 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:54,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:54,442 INFO L85 PathProgramCache]: Analyzing trace with hash -696131705, now seen corresponding path program 1 times [2024-06-27 19:18:54,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:54,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100459445] [2024-06-27 19:18:54,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:54,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:54,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100459445] [2024-06-27 19:18:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100459445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:54,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:54,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683747653] [2024-06-27 19:18:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:54,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:54,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 151 transitions, 1522 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:54,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:54,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:54,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:54,941 INFO L124 PetriNetUnfolderBase]: 1367/2262 cut-off events. [2024-06-27 19:18:54,941 INFO L125 PetriNetUnfolderBase]: For 36487/36487 co-relation queries the response was YES. [2024-06-27 19:18:54,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12359 conditions, 2262 events. 1367/2262 cut-off events. For 36487/36487 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12258 event pairs, 240 based on Foata normal form. 12/2269 useless extension candidates. Maximal degree in co-relation 12299. Up to 1541 conditions per place. [2024-06-27 19:18:54,958 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 51 changer transitions 0/203 dead transitions. [2024-06-27 19:18:54,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 203 transitions, 2221 flow [2024-06-27 19:18:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:18:54,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 19:18:54,960 INFO L175 Difference]: Start difference. First operand has 126 places, 151 transitions, 1522 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:18:54,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 203 transitions, 2221 flow [2024-06-27 19:18:55,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 203 transitions, 2155 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:18:55,023 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1652 flow [2024-06-27 19:18:55,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-27 19:18:55,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-27 19:18:55,024 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1652 flow [2024-06-27 19:18:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:55,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:55,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:18:55,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:55,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:55,026 INFO L85 PathProgramCache]: Analyzing trace with hash -607565945, now seen corresponding path program 2 times [2024-06-27 19:18:55,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:55,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088073193] [2024-06-27 19:18:55,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:55,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:55,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:55,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088073193] [2024-06-27 19:18:55,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088073193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:55,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:55,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:55,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946886996] [2024-06-27 19:18:55,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:55,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:55,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:55,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:55,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:55,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:55,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:55,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:55,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:55,561 INFO L124 PetriNetUnfolderBase]: 1494/2475 cut-off events. [2024-06-27 19:18:55,561 INFO L125 PetriNetUnfolderBase]: For 44908/44908 co-relation queries the response was YES. [2024-06-27 19:18:55,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13940 conditions, 2475 events. 1494/2475 cut-off events. For 44908/44908 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13768 event pairs, 349 based on Foata normal form. 12/2482 useless extension candidates. Maximal degree in co-relation 13877. Up to 1923 conditions per place. [2024-06-27 19:18:55,579 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 50 changer transitions 0/202 dead transitions. [2024-06-27 19:18:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2302 flow [2024-06-27 19:18:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:18:55,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 19:18:55,581 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1652 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:18:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2302 flow [2024-06-27 19:18:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 202 transitions, 2217 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:18:55,662 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1725 flow [2024-06-27 19:18:55,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1725, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-06-27 19:18:55,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 19:18:55,665 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1725 flow [2024-06-27 19:18:55,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:55,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:18:55,666 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:55,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1637195721, now seen corresponding path program 3 times [2024-06-27 19:18:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:55,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93938950] [2024-06-27 19:18:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:55,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93938950] [2024-06-27 19:18:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93938950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:55,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:55,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319811561] [2024-06-27 19:18:55,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:55,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:55,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:55,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1725 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:55,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:55,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:55,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:56,161 INFO L124 PetriNetUnfolderBase]: 1466/2431 cut-off events. [2024-06-27 19:18:56,162 INFO L125 PetriNetUnfolderBase]: For 44886/44886 co-relation queries the response was YES. [2024-06-27 19:18:56,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13648 conditions, 2431 events. 1466/2431 cut-off events. For 44886/44886 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13447 event pairs, 350 based on Foata normal form. 16/2442 useless extension candidates. Maximal degree in co-relation 13582. Up to 2002 conditions per place. [2024-06-27 19:18:56,219 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 49 changer transitions 0/198 dead transitions. [2024-06-27 19:18:56,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 2236 flow [2024-06-27 19:18:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:18:56,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:18:56,221 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 1725 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:18:56,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 2236 flow [2024-06-27 19:18:56,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 198 transitions, 2159 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:56,301 INFO L231 Difference]: Finished difference. Result has 141 places, 160 transitions, 1773 flow [2024-06-27 19:18:56,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1773, PETRI_PLACES=141, PETRI_TRANSITIONS=160} [2024-06-27 19:18:56,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-27 19:18:56,303 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 160 transitions, 1773 flow [2024-06-27 19:18:56,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:56,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:56,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:18:56,304 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:56,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:56,304 INFO L85 PathProgramCache]: Analyzing trace with hash 921617075, now seen corresponding path program 4 times [2024-06-27 19:18:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:56,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090035507] [2024-06-27 19:18:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:56,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:56,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:56,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:56,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090035507] [2024-06-27 19:18:56,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090035507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:56,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:56,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:56,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890616150] [2024-06-27 19:18:56,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:56,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:56,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:56,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:56,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:56,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:56,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 160 transitions, 1773 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:56,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:56,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:56,882 INFO L124 PetriNetUnfolderBase]: 1524/2529 cut-off events. [2024-06-27 19:18:56,882 INFO L125 PetriNetUnfolderBase]: For 48019/48019 co-relation queries the response was YES. [2024-06-27 19:18:56,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14241 conditions, 2529 events. 1524/2529 cut-off events. For 48019/48019 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14174 event pairs, 362 based on Foata normal form. 16/2540 useless extension candidates. Maximal degree in co-relation 14173. Up to 2169 conditions per place. [2024-06-27 19:18:56,900 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 33 changer transitions 0/204 dead transitions. [2024-06-27 19:18:56,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 2307 flow [2024-06-27 19:18:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-27 19:18:56,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-27 19:18:56,902 INFO L175 Difference]: Start difference. First operand has 141 places, 160 transitions, 1773 flow. Second operand 10 states and 233 transitions. [2024-06-27 19:18:56,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 2307 flow [2024-06-27 19:18:56,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 204 transitions, 2212 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:56,993 INFO L231 Difference]: Finished difference. Result has 145 places, 161 transitions, 1770 flow [2024-06-27 19:18:56,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1770, PETRI_PLACES=145, PETRI_TRANSITIONS=161} [2024-06-27 19:18:56,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 19:18:56,994 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 161 transitions, 1770 flow [2024-06-27 19:18:56,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:56,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:56,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:18:56,994 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:56,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1328359101, now seen corresponding path program 5 times [2024-06-27 19:18:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:56,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561070751] [2024-06-27 19:18:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:56,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:57,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:57,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561070751] [2024-06-27 19:18:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561070751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:57,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:57,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349167992] [2024-06-27 19:18:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:57,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:57,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 161 transitions, 1770 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:57,538 INFO L124 PetriNetUnfolderBase]: 1582/2637 cut-off events. [2024-06-27 19:18:57,539 INFO L125 PetriNetUnfolderBase]: For 51756/51756 co-relation queries the response was YES. [2024-06-27 19:18:57,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14778 conditions, 2637 events. 1582/2637 cut-off events. For 51756/51756 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 15060 event pairs, 377 based on Foata normal form. 16/2648 useless extension candidates. Maximal degree in co-relation 14709. Up to 2267 conditions per place. [2024-06-27 19:18:57,557 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-27 19:18:57,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 197 transitions, 2272 flow [2024-06-27 19:18:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:18:57,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-27 19:18:57,558 INFO L175 Difference]: Start difference. First operand has 145 places, 161 transitions, 1770 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:18:57,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 197 transitions, 2272 flow [2024-06-27 19:18:57,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 197 transitions, 2201 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:18:57,627 INFO L231 Difference]: Finished difference. Result has 145 places, 162 transitions, 1791 flow [2024-06-27 19:18:57,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1791, PETRI_PLACES=145, PETRI_TRANSITIONS=162} [2024-06-27 19:18:57,628 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-27 19:18:57,628 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 162 transitions, 1791 flow [2024-06-27 19:18:57,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:57,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:57,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:18:57,629 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:57,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:57,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1328506971, now seen corresponding path program 6 times [2024-06-27 19:18:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:57,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062452146] [2024-06-27 19:18:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:57,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:57,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:57,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062452146] [2024-06-27 19:18:57,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062452146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:57,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:57,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:57,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917343324] [2024-06-27 19:18:57,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:57,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:57,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:57,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:57,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:57,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 162 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:57,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:57,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:57,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:58,248 INFO L124 PetriNetUnfolderBase]: 1623/2708 cut-off events. [2024-06-27 19:18:58,248 INFO L125 PetriNetUnfolderBase]: For 54412/54412 co-relation queries the response was YES. [2024-06-27 19:18:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15191 conditions, 2708 events. 1623/2708 cut-off events. For 54412/54412 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15617 event pairs, 370 based on Foata normal form. 12/2715 useless extension candidates. Maximal degree in co-relation 15121. Up to 2159 conditions per place. [2024-06-27 19:18:58,266 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-27 19:18:58,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 203 transitions, 2351 flow [2024-06-27 19:18:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:18:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:18:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:18:58,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 19:18:58,267 INFO L175 Difference]: Start difference. First operand has 145 places, 162 transitions, 1791 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:18:58,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 203 transitions, 2351 flow [2024-06-27 19:18:58,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 203 transitions, 2280 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:18:58,348 INFO L231 Difference]: Finished difference. Result has 148 places, 165 transitions, 1862 flow [2024-06-27 19:18:58,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1862, PETRI_PLACES=148, PETRI_TRANSITIONS=165} [2024-06-27 19:18:58,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 19:18:58,349 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 165 transitions, 1862 flow [2024-06-27 19:18:58,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:58,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:58,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:18:58,350 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:58,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 921832277, now seen corresponding path program 1 times [2024-06-27 19:18:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:58,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121225759] [2024-06-27 19:18:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121225759] [2024-06-27 19:18:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121225759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:58,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:58,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046064405] [2024-06-27 19:18:58,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:58,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:58,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:58,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 165 transitions, 1862 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:58,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:58,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:58,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:58,951 INFO L124 PetriNetUnfolderBase]: 1664/2789 cut-off events. [2024-06-27 19:18:58,951 INFO L125 PetriNetUnfolderBase]: For 58394/58394 co-relation queries the response was YES. [2024-06-27 19:18:58,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15663 conditions, 2789 events. 1664/2789 cut-off events. For 58394/58394 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16221 event pairs, 385 based on Foata normal form. 12/2796 useless extension candidates. Maximal degree in co-relation 15591. Up to 2230 conditions per place. [2024-06-27 19:18:58,972 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 37 changer transitions 0/212 dead transitions. [2024-06-27 19:18:58,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 212 transitions, 2423 flow [2024-06-27 19:18:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:18:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:18:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 19:18:58,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:18:58,974 INFO L175 Difference]: Start difference. First operand has 148 places, 165 transitions, 1862 flow. Second operand 10 states and 235 transitions. [2024-06-27 19:18:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 212 transitions, 2423 flow [2024-06-27 19:18:59,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 212 transitions, 2365 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:18:59,074 INFO L231 Difference]: Finished difference. Result has 154 places, 166 transitions, 1902 flow [2024-06-27 19:18:59,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1902, PETRI_PLACES=154, PETRI_TRANSITIONS=166} [2024-06-27 19:18:59,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-27 19:18:59,074 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 166 transitions, 1902 flow [2024-06-27 19:18:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:59,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:18:59,075 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:59,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:59,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1056163355, now seen corresponding path program 7 times [2024-06-27 19:18:59,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408692757] [2024-06-27 19:18:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:59,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:59,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408692757] [2024-06-27 19:18:59,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408692757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:59,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:59,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633099124] [2024-06-27 19:18:59,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:59,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:59,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 166 transitions, 1902 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:59,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:59,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:18:59,672 INFO L124 PetriNetUnfolderBase]: 1722/2887 cut-off events. [2024-06-27 19:18:59,672 INFO L125 PetriNetUnfolderBase]: For 64138/64138 co-relation queries the response was YES. [2024-06-27 19:18:59,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16320 conditions, 2887 events. 1722/2887 cut-off events. For 64138/64138 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17008 event pairs, 412 based on Foata normal form. 16/2898 useless extension candidates. Maximal degree in co-relation 16246. Up to 2364 conditions per place. [2024-06-27 19:18:59,692 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2024-06-27 19:18:59,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2414 flow [2024-06-27 19:18:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:18:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:18:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:18:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:18:59,693 INFO L175 Difference]: Start difference. First operand has 154 places, 166 transitions, 1902 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:18:59,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2414 flow [2024-06-27 19:18:59,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 201 transitions, 2330 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:18:59,791 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1945 flow [2024-06-27 19:18:59,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1945, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-27 19:18:59,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-27 19:18:59,792 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1945 flow [2024-06-27 19:18:59,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:18:59,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:18:59,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:18:59,793 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:18:59,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:18:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1267334579, now seen corresponding path program 8 times [2024-06-27 19:18:59,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:18:59,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807014229] [2024-06-27 19:18:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:18:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:18:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:18:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:18:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:18:59,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807014229] [2024-06-27 19:18:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807014229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:18:59,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:18:59,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:18:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252358910] [2024-06-27 19:18:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:18:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:18:59,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:18:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:18:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:18:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:18:59,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1945 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:18:59,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:18:59,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:18:59,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:00,470 INFO L124 PetriNetUnfolderBase]: 1780/2985 cut-off events. [2024-06-27 19:19:00,471 INFO L125 PetriNetUnfolderBase]: For 69433/69433 co-relation queries the response was YES. [2024-06-27 19:19:00,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 2985 events. 1780/2985 cut-off events. For 69433/69433 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 17739 event pairs, 422 based on Foata normal form. 16/2996 useless extension candidates. Maximal degree in co-relation 16854. Up to 2462 conditions per place. [2024-06-27 19:19:00,541 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 48 changer transitions 0/210 dead transitions. [2024-06-27 19:19:00,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 210 transitions, 2497 flow [2024-06-27 19:19:00,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:00,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-27 19:19:00,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-27 19:19:00,543 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1945 flow. Second operand 9 states and 217 transitions. [2024-06-27 19:19:00,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 210 transitions, 2497 flow [2024-06-27 19:19:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 210 transitions, 2401 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:00,643 INFO L231 Difference]: Finished difference. Result has 157 places, 168 transitions, 1982 flow [2024-06-27 19:19:00,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1982, PETRI_PLACES=157, PETRI_TRANSITIONS=168} [2024-06-27 19:19:00,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-27 19:19:00,644 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 168 transitions, 1982 flow [2024-06-27 19:19:00,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:00,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:00,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:00,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:19:00,645 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:00,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1719167379, now seen corresponding path program 9 times [2024-06-27 19:19:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:00,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482988693] [2024-06-27 19:19:00,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:00,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:00,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482988693] [2024-06-27 19:19:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482988693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:00,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:00,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:00,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782802880] [2024-06-27 19:19:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:00,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:00,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:00,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 168 transitions, 1982 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:00,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:00,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:00,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:01,281 INFO L124 PetriNetUnfolderBase]: 1813/3059 cut-off events. [2024-06-27 19:19:01,281 INFO L125 PetriNetUnfolderBase]: For 72643/72655 co-relation queries the response was YES. [2024-06-27 19:19:01,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 3059 events. 1813/3059 cut-off events. For 72643/72655 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 18443 event pairs, 446 based on Foata normal form. 26/3079 useless extension candidates. Maximal degree in co-relation 17154. Up to 2613 conditions per place. [2024-06-27 19:19:01,302 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 155 selfloop transitions, 46 changer transitions 0/208 dead transitions. [2024-06-27 19:19:01,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2524 flow [2024-06-27 19:19:01,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-27 19:19:01,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-27 19:19:01,304 INFO L175 Difference]: Start difference. First operand has 157 places, 168 transitions, 1982 flow. Second operand 9 states and 212 transitions. [2024-06-27 19:19:01,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2524 flow [2024-06-27 19:19:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2422 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:01,418 INFO L231 Difference]: Finished difference. Result has 159 places, 169 transitions, 2008 flow [2024-06-27 19:19:01,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2008, PETRI_PLACES=159, PETRI_TRANSITIONS=169} [2024-06-27 19:19:01,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 19:19:01,419 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 169 transitions, 2008 flow [2024-06-27 19:19:01,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:01,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:19:01,420 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1056311225, now seen corresponding path program 10 times [2024-06-27 19:19:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:01,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320763992] [2024-06-27 19:19:01,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:01,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:01,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:01,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:01,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320763992] [2024-06-27 19:19:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320763992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:01,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:01,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:01,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287955206] [2024-06-27 19:19:01,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:01,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:01,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:01,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:01,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 169 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:01,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:01,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:01,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:01,984 INFO L124 PetriNetUnfolderBase]: 1793/3022 cut-off events. [2024-06-27 19:19:01,984 INFO L125 PetriNetUnfolderBase]: For 67395/67395 co-relation queries the response was YES. [2024-06-27 19:19:01,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16741 conditions, 3022 events. 1793/3022 cut-off events. For 67395/67395 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18089 event pairs, 311 based on Foata normal form. 12/3029 useless extension candidates. Maximal degree in co-relation 16664. Up to 2009 conditions per place. [2024-06-27 19:19:02,006 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 54 changer transitions 0/208 dead transitions. [2024-06-27 19:19:02,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 208 transitions, 2563 flow [2024-06-27 19:19:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:02,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:19:02,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-27 19:19:02,007 INFO L175 Difference]: Start difference. First operand has 159 places, 169 transitions, 2008 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:19:02,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 208 transitions, 2563 flow [2024-06-27 19:19:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 208 transitions, 2444 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:02,129 INFO L231 Difference]: Finished difference. Result has 160 places, 171 transitions, 2070 flow [2024-06-27 19:19:02,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2070, PETRI_PLACES=160, PETRI_TRANSITIONS=171} [2024-06-27 19:19:02,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-27 19:19:02,129 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 171 transitions, 2070 flow [2024-06-27 19:19:02,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:02,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:02,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:19:02,130 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:02,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1050585773, now seen corresponding path program 2 times [2024-06-27 19:19:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92829932] [2024-06-27 19:19:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92829932] [2024-06-27 19:19:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92829932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:02,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:02,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:02,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585605034] [2024-06-27 19:19:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:02,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:02,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:02,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 171 transitions, 2070 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:02,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:02,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:02,748 INFO L124 PetriNetUnfolderBase]: 1834/3103 cut-off events. [2024-06-27 19:19:02,748 INFO L125 PetriNetUnfolderBase]: For 71115/71115 co-relation queries the response was YES. [2024-06-27 19:19:02,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 3103 events. 1834/3103 cut-off events. For 71115/71115 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18741 event pairs, 404 based on Foata normal form. 12/3110 useless extension candidates. Maximal degree in co-relation 17143. Up to 2202 conditions per place. [2024-06-27 19:19:02,766 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 154 selfloop transitions, 56 changer transitions 0/217 dead transitions. [2024-06-27 19:19:02,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 2641 flow [2024-06-27 19:19:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 19:19:02,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:19:02,768 INFO L175 Difference]: Start difference. First operand has 160 places, 171 transitions, 2070 flow. Second operand 9 states and 219 transitions. [2024-06-27 19:19:02,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 2641 flow [2024-06-27 19:19:02,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 217 transitions, 2472 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:02,886 INFO L231 Difference]: Finished difference. Result has 162 places, 172 transitions, 2041 flow [2024-06-27 19:19:02,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2041, PETRI_PLACES=162, PETRI_TRANSITIONS=172} [2024-06-27 19:19:02,886 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 19:19:02,886 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 172 transitions, 2041 flow [2024-06-27 19:19:02,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:02,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:02,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:02,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:19:02,887 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:02,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1719382581, now seen corresponding path program 3 times [2024-06-27 19:19:02,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:02,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163990799] [2024-06-27 19:19:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:02,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163990799] [2024-06-27 19:19:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163990799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:02,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:02,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:02,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928399832] [2024-06-27 19:19:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:03,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:03,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:03,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:03,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 172 transitions, 2041 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:03,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:03,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:03,470 INFO L124 PetriNetUnfolderBase]: 1875/3189 cut-off events. [2024-06-27 19:19:03,470 INFO L125 PetriNetUnfolderBase]: For 71518/71530 co-relation queries the response was YES. [2024-06-27 19:19:03,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17305 conditions, 3189 events. 1875/3189 cut-off events. For 71518/71530 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19572 event pairs, 447 based on Foata normal form. 22/3205 useless extension candidates. Maximal degree in co-relation 17227. Up to 2636 conditions per place. [2024-06-27 19:19:03,501 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 49 changer transitions 0/219 dead transitions. [2024-06-27 19:19:03,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 219 transitions, 2620 flow [2024-06-27 19:19:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-27 19:19:03,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:03,502 INFO L175 Difference]: Start difference. First operand has 162 places, 172 transitions, 2041 flow. Second operand 10 states and 235 transitions. [2024-06-27 19:19:03,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 219 transitions, 2620 flow [2024-06-27 19:19:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 219 transitions, 2492 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:03,624 INFO L231 Difference]: Finished difference. Result has 165 places, 173 transitions, 2039 flow [2024-06-27 19:19:03,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2039, PETRI_PLACES=165, PETRI_TRANSITIONS=173} [2024-06-27 19:19:03,625 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:19:03,625 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 173 transitions, 2039 flow [2024-06-27 19:19:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:03,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:03,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:19:03,626 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:03,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:03,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1726791891, now seen corresponding path program 4 times [2024-06-27 19:19:03,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746488112] [2024-06-27 19:19:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:03,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:03,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746488112] [2024-06-27 19:19:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746488112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:03,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333735167] [2024-06-27 19:19:03,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:03,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:03,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:03,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:03,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 173 transitions, 2039 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:03,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:03,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:03,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:04,275 INFO L124 PetriNetUnfolderBase]: 1855/3157 cut-off events. [2024-06-27 19:19:04,275 INFO L125 PetriNetUnfolderBase]: For 64305/64317 co-relation queries the response was YES. [2024-06-27 19:19:04,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16652 conditions, 3157 events. 1855/3157 cut-off events. For 64305/64317 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19305 event pairs, 404 based on Foata normal form. 22/3173 useless extension candidates. Maximal degree in co-relation 16573. Up to 1952 conditions per place. [2024-06-27 19:19:04,299 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 60 changer transitions 0/215 dead transitions. [2024-06-27 19:19:04,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 215 transitions, 2516 flow [2024-06-27 19:19:04,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:19:04,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 19:19:04,300 INFO L175 Difference]: Start difference. First operand has 165 places, 173 transitions, 2039 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:19:04,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 215 transitions, 2516 flow [2024-06-27 19:19:04,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 215 transitions, 2406 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:04,398 INFO L231 Difference]: Finished difference. Result has 165 places, 172 transitions, 1987 flow [2024-06-27 19:19:04,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1987, PETRI_PLACES=165, PETRI_TRANSITIONS=172} [2024-06-27 19:19:04,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:19:04,399 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 172 transitions, 1987 flow [2024-06-27 19:19:04,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:04,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:04,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:04,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:19:04,399 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:04,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:04,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1369809045, now seen corresponding path program 1 times [2024-06-27 19:19:04,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:04,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519022544] [2024-06-27 19:19:04,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:04,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519022544] [2024-06-27 19:19:04,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519022544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:04,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:04,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381410566] [2024-06-27 19:19:04,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:04,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:04,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 172 transitions, 1987 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:04,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:04,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:04,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:04,836 INFO L124 PetriNetUnfolderBase]: 1860/3176 cut-off events. [2024-06-27 19:19:04,836 INFO L125 PetriNetUnfolderBase]: For 61040/61043 co-relation queries the response was YES. [2024-06-27 19:19:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 3176 events. 1860/3176 cut-off events. For 61040/61043 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19511 event pairs, 436 based on Foata normal form. 3/3176 useless extension candidates. Maximal degree in co-relation 16771. Up to 2913 conditions per place. [2024-06-27 19:19:04,860 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 168 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-27 19:19:04,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 192 transitions, 2528 flow [2024-06-27 19:19:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:04,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:19:04,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:19:04,863 INFO L175 Difference]: Start difference. First operand has 165 places, 172 transitions, 1987 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:19:04,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 192 transitions, 2528 flow [2024-06-27 19:19:04,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 192 transitions, 2359 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:04,966 INFO L231 Difference]: Finished difference. Result has 162 places, 178 transitions, 1928 flow [2024-06-27 19:19:04,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1928, PETRI_PLACES=162, PETRI_TRANSITIONS=178} [2024-06-27 19:19:04,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-27 19:19:04,967 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 178 transitions, 1928 flow [2024-06-27 19:19:04,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:04,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:04,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:04,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:19:04,969 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:04,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1390254165, now seen corresponding path program 2 times [2024-06-27 19:19:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425805230] [2024-06-27 19:19:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:04,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:04,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:05,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:05,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425805230] [2024-06-27 19:19:05,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425805230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:05,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:05,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:05,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668278937] [2024-06-27 19:19:05,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:05,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:05,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:05,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:05,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:05,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:05,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 178 transitions, 1928 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:05,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:05,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:05,493 INFO L124 PetriNetUnfolderBase]: 1857/3172 cut-off events. [2024-06-27 19:19:05,493 INFO L125 PetriNetUnfolderBase]: For 62846/62849 co-relation queries the response was YES. [2024-06-27 19:19:05,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16523 conditions, 3172 events. 1857/3172 cut-off events. For 62846/62849 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19528 event pairs, 436 based on Foata normal form. 3/3172 useless extension candidates. Maximal degree in co-relation 16443. Up to 2913 conditions per place. [2024-06-27 19:19:05,526 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 169 selfloop transitions, 14 changer transitions 0/190 dead transitions. [2024-06-27 19:19:05,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 190 transitions, 2329 flow [2024-06-27 19:19:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:19:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:19:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-27 19:19:05,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:19:05,528 INFO L175 Difference]: Start difference. First operand has 162 places, 178 transitions, 1928 flow. Second operand 4 states and 99 transitions. [2024-06-27 19:19:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 190 transitions, 2329 flow [2024-06-27 19:19:05,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 190 transitions, 2277 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 19:19:05,631 INFO L231 Difference]: Finished difference. Result has 165 places, 178 transitions, 1914 flow [2024-06-27 19:19:05,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1914, PETRI_PLACES=165, PETRI_TRANSITIONS=178} [2024-06-27 19:19:05,632 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 124 predicate places. [2024-06-27 19:19:05,632 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 178 transitions, 1914 flow [2024-06-27 19:19:05,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:05,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:05,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:19:05,633 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:05,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:05,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-27 19:19:05,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:05,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811438931] [2024-06-27 19:19:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:05,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:05,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:05,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811438931] [2024-06-27 19:19:05,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811438931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:05,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515591814] [2024-06-27 19:19:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:05,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:19:05,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 178 transitions, 1914 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:05,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:05,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:19:05,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:06,127 INFO L124 PetriNetUnfolderBase]: 1798/3082 cut-off events. [2024-06-27 19:19:06,127 INFO L125 PetriNetUnfolderBase]: For 69424/69445 co-relation queries the response was YES. [2024-06-27 19:19:06,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16128 conditions, 3082 events. 1798/3082 cut-off events. For 69424/69445 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19086 event pairs, 426 based on Foata normal form. 28/3077 useless extension candidates. Maximal degree in co-relation 16046. Up to 2731 conditions per place. [2024-06-27 19:19:06,150 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 146 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-27 19:19:06,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 191 transitions, 2322 flow [2024-06-27 19:19:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:06,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 19:19:06,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:19:06,151 INFO L175 Difference]: Start difference. First operand has 165 places, 178 transitions, 1914 flow. Second operand 5 states and 120 transitions. [2024-06-27 19:19:06,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 191 transitions, 2322 flow [2024-06-27 19:19:06,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 191 transitions, 2294 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:06,271 INFO L231 Difference]: Finished difference. Result has 167 places, 181 transitions, 1991 flow [2024-06-27 19:19:06,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1991, PETRI_PLACES=167, PETRI_TRANSITIONS=181} [2024-06-27 19:19:06,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-27 19:19:06,271 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 181 transitions, 1991 flow [2024-06-27 19:19:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:06,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:19:06,272 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:06,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1385967847, now seen corresponding path program 1 times [2024-06-27 19:19:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:06,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573667968] [2024-06-27 19:19:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:06,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573667968] [2024-06-27 19:19:06,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573667968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:06,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:06,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:06,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704454676] [2024-06-27 19:19:06,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:06,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:06,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 181 transitions, 1991 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:06,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:06,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:06,779 INFO L124 PetriNetUnfolderBase]: 1873/3183 cut-off events. [2024-06-27 19:19:06,780 INFO L125 PetriNetUnfolderBase]: For 67415/67424 co-relation queries the response was YES. [2024-06-27 19:19:06,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16901 conditions, 3183 events. 1873/3183 cut-off events. For 67415/67424 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19463 event pairs, 436 based on Foata normal form. 9/3189 useless extension candidates. Maximal degree in co-relation 16818. Up to 2901 conditions per place. [2024-06-27 19:19:06,801 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 178 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-27 19:19:06,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 209 transitions, 2624 flow [2024-06-27 19:19:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:19:06,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:06,806 INFO L175 Difference]: Start difference. First operand has 167 places, 181 transitions, 1991 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:19:06,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 209 transitions, 2624 flow [2024-06-27 19:19:06,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 209 transitions, 2539 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:06,939 INFO L231 Difference]: Finished difference. Result has 173 places, 189 transitions, 2074 flow [2024-06-27 19:19:06,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1910, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2074, PETRI_PLACES=173, PETRI_TRANSITIONS=189} [2024-06-27 19:19:06,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-27 19:19:06,939 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 189 transitions, 2074 flow [2024-06-27 19:19:06,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:06,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:06,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:06,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:19:06,940 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:06,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2025313087, now seen corresponding path program 2 times [2024-06-27 19:19:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:06,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695039565] [2024-06-27 19:19:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695039565] [2024-06-27 19:19:07,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695039565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:07,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:07,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:07,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895563909] [2024-06-27 19:19:07,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:07,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:07,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 189 transitions, 2074 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:07,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:07,475 INFO L124 PetriNetUnfolderBase]: 1878/3193 cut-off events. [2024-06-27 19:19:07,475 INFO L125 PetriNetUnfolderBase]: For 70317/70323 co-relation queries the response was YES. [2024-06-27 19:19:07,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17001 conditions, 3193 events. 1878/3193 cut-off events. For 70317/70323 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19581 event pairs, 447 based on Foata normal form. 3/3191 useless extension candidates. Maximal degree in co-relation 16914. Up to 2907 conditions per place. [2024-06-27 19:19:07,498 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 170 selfloop transitions, 29 changer transitions 0/206 dead transitions. [2024-06-27 19:19:07,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 206 transitions, 2648 flow [2024-06-27 19:19:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-27 19:19:07,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:19:07,499 INFO L175 Difference]: Start difference. First operand has 173 places, 189 transitions, 2074 flow. Second operand 5 states and 118 transitions. [2024-06-27 19:19:07,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 206 transitions, 2648 flow [2024-06-27 19:19:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 206 transitions, 2615 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-27 19:19:07,652 INFO L231 Difference]: Finished difference. Result has 178 places, 194 transitions, 2177 flow [2024-06-27 19:19:07,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2177, PETRI_PLACES=178, PETRI_TRANSITIONS=194} [2024-06-27 19:19:07,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 19:19:07,652 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 194 transitions, 2177 flow [2024-06-27 19:19:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:07,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:07,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:19:07,653 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:07,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2025301927, now seen corresponding path program 3 times [2024-06-27 19:19:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:07,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44111860] [2024-06-27 19:19:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:07,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:07,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:07,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:07,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44111860] [2024-06-27 19:19:07,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44111860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:07,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:07,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:07,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438114600] [2024-06-27 19:19:07,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:07,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:07,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:07,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 194 transitions, 2177 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:07,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:07,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:07,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:08,202 INFO L124 PetriNetUnfolderBase]: 1875/3192 cut-off events. [2024-06-27 19:19:08,202 INFO L125 PetriNetUnfolderBase]: For 72874/72886 co-relation queries the response was YES. [2024-06-27 19:19:08,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17079 conditions, 3192 events. 1875/3192 cut-off events. For 72874/72886 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 19635 event pairs, 439 based on Foata normal form. 11/3200 useless extension candidates. Maximal degree in co-relation 16989. Up to 2904 conditions per place. [2024-06-27 19:19:08,225 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 28 changer transitions 0/211 dead transitions. [2024-06-27 19:19:08,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 211 transitions, 2646 flow [2024-06-27 19:19:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-27 19:19:08,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-27 19:19:08,226 INFO L175 Difference]: Start difference. First operand has 178 places, 194 transitions, 2177 flow. Second operand 5 states and 122 transitions. [2024-06-27 19:19:08,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 211 transitions, 2646 flow [2024-06-27 19:19:08,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 211 transitions, 2623 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:19:08,384 INFO L231 Difference]: Finished difference. Result has 182 places, 194 transitions, 2220 flow [2024-06-27 19:19:08,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2220, PETRI_PLACES=182, PETRI_TRANSITIONS=194} [2024-06-27 19:19:08,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 19:19:08,384 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 194 transitions, 2220 flow [2024-06-27 19:19:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:08,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:08,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:08,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:19:08,385 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:08,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-27 19:19:08,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:08,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906183555] [2024-06-27 19:19:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:08,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:08,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906183555] [2024-06-27 19:19:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906183555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:08,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:08,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175519210] [2024-06-27 19:19:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:08,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:08,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:08,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:08,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:08,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 194 transitions, 2220 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:08,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:08,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:08,878 INFO L124 PetriNetUnfolderBase]: 1903/3241 cut-off events. [2024-06-27 19:19:08,879 INFO L125 PetriNetUnfolderBase]: For 79364/79379 co-relation queries the response was YES. [2024-06-27 19:19:08,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17515 conditions, 3241 events. 1903/3241 cut-off events. For 79364/79379 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20041 event pairs, 456 based on Foata normal form. 14/3249 useless extension candidates. Maximal degree in co-relation 17423. Up to 2825 conditions per place. [2024-06-27 19:19:08,904 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 46 changer transitions 0/222 dead transitions. [2024-06-27 19:19:08,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 222 transitions, 3002 flow [2024-06-27 19:19:08,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-27 19:19:08,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:19:08,905 INFO L175 Difference]: Start difference. First operand has 182 places, 194 transitions, 2220 flow. Second operand 6 states and 144 transitions. [2024-06-27 19:19:08,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 222 transitions, 3002 flow [2024-06-27 19:19:09,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 222 transitions, 2944 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:09,062 INFO L231 Difference]: Finished difference. Result has 185 places, 205 transitions, 2413 flow [2024-06-27 19:19:09,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2413, PETRI_PLACES=185, PETRI_TRANSITIONS=205} [2024-06-27 19:19:09,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-27 19:19:09,063 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 205 transitions, 2413 flow [2024-06-27 19:19:09,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:09,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:09,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:19:09,063 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:09,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 148212823, now seen corresponding path program 2 times [2024-06-27 19:19:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:09,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341187244] [2024-06-27 19:19:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:09,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:09,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:09,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341187244] [2024-06-27 19:19:09,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341187244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:09,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:09,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:09,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141658638] [2024-06-27 19:19:09,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:09,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:09,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:09,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 205 transitions, 2413 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:09,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:09,606 INFO L124 PetriNetUnfolderBase]: 1921/3270 cut-off events. [2024-06-27 19:19:09,606 INFO L125 PetriNetUnfolderBase]: For 81814/81829 co-relation queries the response was YES. [2024-06-27 19:19:09,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18184 conditions, 3270 events. 1921/3270 cut-off events. For 81814/81829 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20234 event pairs, 454 based on Foata normal form. 14/3278 useless extension candidates. Maximal degree in co-relation 18091. Up to 2868 conditions per place. [2024-06-27 19:19:09,632 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 170 selfloop transitions, 53 changer transitions 0/230 dead transitions. [2024-06-27 19:19:09,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 230 transitions, 3183 flow [2024-06-27 19:19:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:19:09,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:19:09,633 INFO L175 Difference]: Start difference. First operand has 185 places, 205 transitions, 2413 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:19:09,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 230 transitions, 3183 flow [2024-06-27 19:19:09,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 230 transitions, 3086 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-27 19:19:09,810 INFO L231 Difference]: Finished difference. Result has 192 places, 214 transitions, 2584 flow [2024-06-27 19:19:09,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2584, PETRI_PLACES=192, PETRI_TRANSITIONS=214} [2024-06-27 19:19:09,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-27 19:19:09,810 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 214 transitions, 2584 flow [2024-06-27 19:19:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:09,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:19:09,811 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:09,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:09,811 INFO L85 PathProgramCache]: Analyzing trace with hash 148207243, now seen corresponding path program 3 times [2024-06-27 19:19:09,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:09,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598498226] [2024-06-27 19:19:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598498226] [2024-06-27 19:19:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598498226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:09,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:09,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:09,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439342253] [2024-06-27 19:19:09,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:09,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:09,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:09,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:09,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 214 transitions, 2584 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:09,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:09,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:09,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:10,338 INFO L124 PetriNetUnfolderBase]: 1917/3266 cut-off events. [2024-06-27 19:19:10,339 INFO L125 PetriNetUnfolderBase]: For 84192/84207 co-relation queries the response was YES. [2024-06-27 19:19:10,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18348 conditions, 3266 events. 1917/3266 cut-off events. For 84192/84207 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20219 event pairs, 458 based on Foata normal form. 14/3274 useless extension candidates. Maximal degree in co-relation 18252. Up to 2866 conditions per place. [2024-06-27 19:19:10,364 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 175 selfloop transitions, 45 changer transitions 0/227 dead transitions. [2024-06-27 19:19:10,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 227 transitions, 3138 flow [2024-06-27 19:19:10,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 19:19:10,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-27 19:19:10,366 INFO L175 Difference]: Start difference. First operand has 192 places, 214 transitions, 2584 flow. Second operand 5 states and 123 transitions. [2024-06-27 19:19:10,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 227 transitions, 3138 flow [2024-06-27 19:19:10,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 227 transitions, 2980 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:10,585 INFO L231 Difference]: Finished difference. Result has 193 places, 214 transitions, 2524 flow [2024-06-27 19:19:10,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2524, PETRI_PLACES=193, PETRI_TRANSITIONS=214} [2024-06-27 19:19:10,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-27 19:19:10,586 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 214 transitions, 2524 flow [2024-06-27 19:19:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:10,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:10,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:19:10,587 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:10,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1376312012, now seen corresponding path program 1 times [2024-06-27 19:19:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:10,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524254752] [2024-06-27 19:19:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524254752] [2024-06-27 19:19:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524254752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:10,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:10,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:10,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647584673] [2024-06-27 19:19:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:10,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:10,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:10,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:10,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 214 transitions, 2524 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:10,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:10,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:11,121 INFO L124 PetriNetUnfolderBase]: 1938/3292 cut-off events. [2024-06-27 19:19:11,121 INFO L125 PetriNetUnfolderBase]: For 87861/87861 co-relation queries the response was YES. [2024-06-27 19:19:11,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18695 conditions, 3292 events. 1938/3292 cut-off events. For 87861/87861 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20314 event pairs, 448 based on Foata normal form. 1/3284 useless extension candidates. Maximal degree in co-relation 18598. Up to 2861 conditions per place. [2024-06-27 19:19:11,147 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 172 selfloop transitions, 67 changer transitions 0/246 dead transitions. [2024-06-27 19:19:11,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 246 transitions, 3328 flow [2024-06-27 19:19:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:19:11,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:19:11,148 INFO L175 Difference]: Start difference. First operand has 193 places, 214 transitions, 2524 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:19:11,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 246 transitions, 3328 flow [2024-06-27 19:19:11,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 246 transitions, 3230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:11,322 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2662 flow [2024-06-27 19:19:11,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2662, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-27 19:19:11,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 19:19:11,322 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2662 flow [2024-06-27 19:19:11,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:11,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:11,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:19:11,323 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:11,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -933443626, now seen corresponding path program 2 times [2024-06-27 19:19:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:11,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278783704] [2024-06-27 19:19:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278783704] [2024-06-27 19:19:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278783704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:11,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:11,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:11,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828605596] [2024-06-27 19:19:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:11,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:11,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2662 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:11,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:11,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:11,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:11,964 INFO L124 PetriNetUnfolderBase]: 1948/3309 cut-off events. [2024-06-27 19:19:11,965 INFO L125 PetriNetUnfolderBase]: For 91454/91457 co-relation queries the response was YES. [2024-06-27 19:19:11,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18965 conditions, 3309 events. 1948/3309 cut-off events. For 91454/91457 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20410 event pairs, 436 based on Foata normal form. 3/3307 useless extension candidates. Maximal degree in co-relation 18867. Up to 2973 conditions per place. [2024-06-27 19:19:11,985 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 201 selfloop transitions, 39 changer transitions 0/247 dead transitions. [2024-06-27 19:19:11,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 3281 flow [2024-06-27 19:19:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:11,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:19:11,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:19:11,986 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2662 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:19:11,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 3281 flow [2024-06-27 19:19:12,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 247 transitions, 3150 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:12,208 INFO L231 Difference]: Finished difference. Result has 200 places, 227 transitions, 2710 flow [2024-06-27 19:19:12,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2710, PETRI_PLACES=200, PETRI_TRANSITIONS=227} [2024-06-27 19:19:12,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-27 19:19:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 227 transitions, 2710 flow [2024-06-27 19:19:12,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:12,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:12,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:19:12,209 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:12,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:12,209 INFO L85 PathProgramCache]: Analyzing trace with hash 98775858, now seen corresponding path program 3 times [2024-06-27 19:19:12,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:12,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433683412] [2024-06-27 19:19:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:12,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:12,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:12,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433683412] [2024-06-27 19:19:12,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433683412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:12,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:12,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68190888] [2024-06-27 19:19:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:12,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:12,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 227 transitions, 2710 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:12,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:12,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:12,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:12,747 INFO L124 PetriNetUnfolderBase]: 1976/3352 cut-off events. [2024-06-27 19:19:12,748 INFO L125 PetriNetUnfolderBase]: For 96247/96250 co-relation queries the response was YES. [2024-06-27 19:19:12,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19303 conditions, 3352 events. 1976/3352 cut-off events. For 96247/96250 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20665 event pairs, 436 based on Foata normal form. 3/3350 useless extension candidates. Maximal degree in co-relation 19204. Up to 2994 conditions per place. [2024-06-27 19:19:12,774 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 201 selfloop transitions, 53 changer transitions 0/261 dead transitions. [2024-06-27 19:19:12,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 261 transitions, 3582 flow [2024-06-27 19:19:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-27 19:19:12,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:19:12,775 INFO L175 Difference]: Start difference. First operand has 200 places, 227 transitions, 2710 flow. Second operand 8 states and 180 transitions. [2024-06-27 19:19:12,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 261 transitions, 3582 flow [2024-06-27 19:19:13,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 3464 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:13,018 INFO L231 Difference]: Finished difference. Result has 206 places, 242 transitions, 2967 flow [2024-06-27 19:19:13,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2610, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2967, PETRI_PLACES=206, PETRI_TRANSITIONS=242} [2024-06-27 19:19:13,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-27 19:19:13,019 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 242 transitions, 2967 flow [2024-06-27 19:19:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:13,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:19:13,020 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:13,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2058010098, now seen corresponding path program 4 times [2024-06-27 19:19:13,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455049951] [2024-06-27 19:19:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:13,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455049951] [2024-06-27 19:19:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455049951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:13,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583529430] [2024-06-27 19:19:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:13,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:13,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 242 transitions, 2967 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:13,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:13,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:13,606 INFO L124 PetriNetUnfolderBase]: 2005/3400 cut-off events. [2024-06-27 19:19:13,606 INFO L125 PetriNetUnfolderBase]: For 104598/104613 co-relation queries the response was YES. [2024-06-27 19:19:13,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19869 conditions, 3400 events. 2005/3400 cut-off events. For 104598/104613 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21038 event pairs, 461 based on Foata normal form. 13/3407 useless extension candidates. Maximal degree in co-relation 19767. Up to 2908 conditions per place. [2024-06-27 19:19:13,636 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 183 selfloop transitions, 80 changer transitions 0/270 dead transitions. [2024-06-27 19:19:13,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 270 transitions, 3845 flow [2024-06-27 19:19:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:13,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:19:13,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:19:13,637 INFO L175 Difference]: Start difference. First operand has 206 places, 242 transitions, 2967 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:19:13,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 270 transitions, 3845 flow [2024-06-27 19:19:13,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 270 transitions, 3740 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:13,938 INFO L231 Difference]: Finished difference. Result has 211 places, 252 transitions, 3177 flow [2024-06-27 19:19:13,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3177, PETRI_PLACES=211, PETRI_TRANSITIONS=252} [2024-06-27 19:19:13,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-27 19:19:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 252 transitions, 3177 flow [2024-06-27 19:19:13,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:13,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:13,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:13,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:19:13,940 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:13,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash -449451026, now seen corresponding path program 5 times [2024-06-27 19:19:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:13,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489084432] [2024-06-27 19:19:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:14,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489084432] [2024-06-27 19:19:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489084432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833656123] [2024-06-27 19:19:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:14,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:14,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 252 transitions, 3177 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:14,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:14,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:14,490 INFO L124 PetriNetUnfolderBase]: 2002/3387 cut-off events. [2024-06-27 19:19:14,490 INFO L125 PetriNetUnfolderBase]: For 107006/107006 co-relation queries the response was YES. [2024-06-27 19:19:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20044 conditions, 3387 events. 2002/3387 cut-off events. For 107006/107006 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20879 event pairs, 448 based on Foata normal form. 1/3379 useless extension candidates. Maximal degree in co-relation 19940. Up to 2906 conditions per place. [2024-06-27 19:19:14,517 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 98 changer transitions 0/273 dead transitions. [2024-06-27 19:19:14,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 273 transitions, 3945 flow [2024-06-27 19:19:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:19:14,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:19:14,518 INFO L175 Difference]: Start difference. First operand has 211 places, 252 transitions, 3177 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:19:14,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 273 transitions, 3945 flow [2024-06-27 19:19:14,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 273 transitions, 3835 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:14,806 INFO L231 Difference]: Finished difference. Result has 215 places, 252 transitions, 3273 flow [2024-06-27 19:19:14,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3067, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3273, PETRI_PLACES=215, PETRI_TRANSITIONS=252} [2024-06-27 19:19:14,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-27 19:19:14,807 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 252 transitions, 3273 flow [2024-06-27 19:19:14,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:14,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:14,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:19:14,807 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1091774712, now seen corresponding path program 6 times [2024-06-27 19:19:14,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:14,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836447204] [2024-06-27 19:19:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:14,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836447204] [2024-06-27 19:19:14,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836447204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:14,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:14,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:14,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741450259] [2024-06-27 19:19:14,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:14,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:14,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:14,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:14,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:14,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 252 transitions, 3273 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:14,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:14,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:14,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:15,357 INFO L124 PetriNetUnfolderBase]: 1994/3384 cut-off events. [2024-06-27 19:19:15,358 INFO L125 PetriNetUnfolderBase]: For 111350/111365 co-relation queries the response was YES. [2024-06-27 19:19:15,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20062 conditions, 3384 events. 1994/3384 cut-off events. For 111350/111365 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20974 event pairs, 461 based on Foata normal form. 14/3392 useless extension candidates. Maximal degree in co-relation 19957. Up to 2898 conditions per place. [2024-06-27 19:19:15,386 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 182 selfloop transitions, 77 changer transitions 0/266 dead transitions. [2024-06-27 19:19:15,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 266 transitions, 3919 flow [2024-06-27 19:19:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:19:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:19:15,387 INFO L175 Difference]: Start difference. First operand has 215 places, 252 transitions, 3273 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:19:15,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 266 transitions, 3919 flow [2024-06-27 19:19:15,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 266 transitions, 3649 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:15,704 INFO L231 Difference]: Finished difference. Result has 215 places, 252 transitions, 3167 flow [2024-06-27 19:19:15,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3005, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3167, PETRI_PLACES=215, PETRI_TRANSITIONS=252} [2024-06-27 19:19:15,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-27 19:19:15,704 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 252 transitions, 3167 flow [2024-06-27 19:19:15,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:15,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:15,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:19:15,705 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:15,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:15,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1996344938, now seen corresponding path program 7 times [2024-06-27 19:19:15,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:15,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104284802] [2024-06-27 19:19:15,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:15,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:15,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104284802] [2024-06-27 19:19:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104284802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:15,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:15,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:15,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323221968] [2024-06-27 19:19:15,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:15,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:15,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:15,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:15,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:15,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:15,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 252 transitions, 3167 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:15,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:15,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:15,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:16,281 INFO L124 PetriNetUnfolderBase]: 1991/3374 cut-off events. [2024-06-27 19:19:16,281 INFO L125 PetriNetUnfolderBase]: For 107723/107726 co-relation queries the response was YES. [2024-06-27 19:19:16,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19831 conditions, 3374 events. 1991/3374 cut-off events. For 107723/107726 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20794 event pairs, 436 based on Foata normal form. 3/3372 useless extension candidates. Maximal degree in co-relation 19727. Up to 3016 conditions per place. [2024-06-27 19:19:16,309 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 52 changer transitions 0/268 dead transitions. [2024-06-27 19:19:16,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 268 transitions, 3729 flow [2024-06-27 19:19:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:19:16,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:19:16,310 INFO L175 Difference]: Start difference. First operand has 215 places, 252 transitions, 3167 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:19:16,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 268 transitions, 3729 flow [2024-06-27 19:19:16,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 268 transitions, 3545 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:16,597 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3101 flow [2024-06-27 19:19:16,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3101, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-27 19:19:16,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 19:19:16,598 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3101 flow [2024-06-27 19:19:16,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:16,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:16,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:19:16,599 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:16,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash 299444468, now seen corresponding path program 8 times [2024-06-27 19:19:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:16,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014170649] [2024-06-27 19:19:16,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:16,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:16,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:16,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014170649] [2024-06-27 19:19:16,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014170649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:16,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:16,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:16,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798537436] [2024-06-27 19:19:16,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:16,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:16,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:16,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:16,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:16,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:16,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3101 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:16,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:16,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:16,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:17,174 INFO L124 PetriNetUnfolderBase]: 1985/3372 cut-off events. [2024-06-27 19:19:17,175 INFO L125 PetriNetUnfolderBase]: For 111285/111300 co-relation queries the response was YES. [2024-06-27 19:19:17,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19663 conditions, 3372 events. 1985/3372 cut-off events. For 111285/111300 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20889 event pairs, 461 based on Foata normal form. 14/3380 useless extension candidates. Maximal degree in co-relation 19558. Up to 2921 conditions per place. [2024-06-27 19:19:17,202 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 195 selfloop transitions, 66 changer transitions 0/268 dead transitions. [2024-06-27 19:19:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 268 transitions, 3759 flow [2024-06-27 19:19:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:19:17,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-27 19:19:17,203 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3101 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:19:17,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 268 transitions, 3759 flow [2024-06-27 19:19:17,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 268 transitions, 3639 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:17,526 INFO L231 Difference]: Finished difference. Result has 216 places, 252 transitions, 3126 flow [2024-06-27 19:19:17,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3126, PETRI_PLACES=216, PETRI_TRANSITIONS=252} [2024-06-27 19:19:17,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 19:19:17,526 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 252 transitions, 3126 flow [2024-06-27 19:19:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:17,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:17,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:19:17,527 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:17,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash 299207318, now seen corresponding path program 9 times [2024-06-27 19:19:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:17,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979035183] [2024-06-27 19:19:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:17,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979035183] [2024-06-27 19:19:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979035183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084510242] [2024-06-27 19:19:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:17,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:17,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:17,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 252 transitions, 3126 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:17,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:17,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:17,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:18,086 INFO L124 PetriNetUnfolderBase]: 1971/3346 cut-off events. [2024-06-27 19:19:18,087 INFO L125 PetriNetUnfolderBase]: For 111785/111788 co-relation queries the response was YES. [2024-06-27 19:19:18,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19468 conditions, 3346 events. 1971/3346 cut-off events. For 111785/111788 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20655 event pairs, 436 based on Foata normal form. 6/3347 useless extension candidates. Maximal degree in co-relation 19362. Up to 2908 conditions per place. [2024-06-27 19:19:18,117 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 187 selfloop transitions, 84 changer transitions 0/278 dead transitions. [2024-06-27 19:19:18,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3734 flow [2024-06-27 19:19:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:18,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:19:18,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:19:18,120 INFO L175 Difference]: Start difference. First operand has 216 places, 252 transitions, 3126 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:19:18,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3734 flow [2024-06-27 19:19:18,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 278 transitions, 3513 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:18,458 INFO L231 Difference]: Finished difference. Result has 217 places, 252 transitions, 3105 flow [2024-06-27 19:19:18,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3105, PETRI_PLACES=217, PETRI_TRANSITIONS=252} [2024-06-27 19:19:18,458 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-27 19:19:18,459 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 252 transitions, 3105 flow [2024-06-27 19:19:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:18,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:18,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:19:18,459 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:18,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-27 19:19:18,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:18,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179001348] [2024-06-27 19:19:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:18,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:18,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:18,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179001348] [2024-06-27 19:19:18,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179001348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:18,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:18,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:18,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041212516] [2024-06-27 19:19:18,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:18,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:19:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 252 transitions, 3105 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:19:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:19,000 INFO L124 PetriNetUnfolderBase]: 1925/3287 cut-off events. [2024-06-27 19:19:19,000 INFO L125 PetriNetUnfolderBase]: For 111748/111751 co-relation queries the response was YES. [2024-06-27 19:19:19,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19241 conditions, 3287 events. 1925/3287 cut-off events. For 111748/111751 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20460 event pairs, 414 based on Foata normal form. 7/3264 useless extension candidates. Maximal degree in co-relation 19135. Up to 2894 conditions per place. [2024-06-27 19:19:19,027 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 206 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-27 19:19:19,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 270 transitions, 3671 flow [2024-06-27 19:19:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:19,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:19,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-27 19:19:19,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 19:19:19,028 INFO L175 Difference]: Start difference. First operand has 217 places, 252 transitions, 3105 flow. Second operand 5 states and 126 transitions. [2024-06-27 19:19:19,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 270 transitions, 3671 flow [2024-06-27 19:19:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 270 transitions, 3475 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:19,306 INFO L231 Difference]: Finished difference. Result has 214 places, 254 transitions, 3034 flow [2024-06-27 19:19:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3034, PETRI_PLACES=214, PETRI_TRANSITIONS=254} [2024-06-27 19:19:19,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-27 19:19:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 254 transitions, 3034 flow [2024-06-27 19:19:19,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:19,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:19:19,308 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-27 19:19:19,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293615124] [2024-06-27 19:19:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:19,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:19,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:19,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293615124] [2024-06-27 19:19:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293615124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:19,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:19,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:19:19,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296154376] [2024-06-27 19:19:19,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:19,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:19:19,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:19,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:19:19,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:19:19,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-27 19:19:19,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 254 transitions, 3034 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:19,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:19,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-27 19:19:19,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:19,875 INFO L124 PetriNetUnfolderBase]: 1916/3274 cut-off events. [2024-06-27 19:19:19,876 INFO L125 PetriNetUnfolderBase]: For 97794/97818 co-relation queries the response was YES. [2024-06-27 19:19:19,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18641 conditions, 3274 events. 1916/3274 cut-off events. For 97794/97818 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20449 event pairs, 426 based on Foata normal form. 26/3264 useless extension candidates. Maximal degree in co-relation 18536. Up to 2842 conditions per place. [2024-06-27 19:19:19,903 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 211 selfloop transitions, 35 changer transitions 0/267 dead transitions. [2024-06-27 19:19:19,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3584 flow [2024-06-27 19:19:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-27 19:19:19,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-27 19:19:19,904 INFO L175 Difference]: Start difference. First operand has 214 places, 254 transitions, 3034 flow. Second operand 5 states and 119 transitions. [2024-06-27 19:19:19,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3584 flow [2024-06-27 19:19:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3479 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:20,211 INFO L231 Difference]: Finished difference. Result has 216 places, 256 transitions, 3040 flow [2024-06-27 19:19:20,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3040, PETRI_PLACES=216, PETRI_TRANSITIONS=256} [2024-06-27 19:19:20,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-27 19:19:20,212 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 256 transitions, 3040 flow [2024-06-27 19:19:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:20,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:20,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:20,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:19:20,212 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:20,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2123672596, now seen corresponding path program 1 times [2024-06-27 19:19:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:20,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843790501] [2024-06-27 19:19:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:20,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843790501] [2024-06-27 19:19:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843790501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:20,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:20,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081526354] [2024-06-27 19:19:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:20,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:20,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:20,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 256 transitions, 3040 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:20,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:20,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:20,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:20,855 INFO L124 PetriNetUnfolderBase]: 1985/3370 cut-off events. [2024-06-27 19:19:20,855 INFO L125 PetriNetUnfolderBase]: For 97489/97492 co-relation queries the response was YES. [2024-06-27 19:19:20,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19203 conditions, 3370 events. 1985/3370 cut-off events. For 97489/97492 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20883 event pairs, 401 based on Foata normal form. 4/3371 useless extension candidates. Maximal degree in co-relation 19097. Up to 3057 conditions per place. [2024-06-27 19:19:20,887 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 249 selfloop transitions, 23 changer transitions 0/279 dead transitions. [2024-06-27 19:19:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3796 flow [2024-06-27 19:19:20,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:20,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:19:20,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:19:20,889 INFO L175 Difference]: Start difference. First operand has 216 places, 256 transitions, 3040 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:19:20,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3796 flow [2024-06-27 19:19:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 279 transitions, 3701 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:21,258 INFO L231 Difference]: Finished difference. Result has 219 places, 260 transitions, 3072 flow [2024-06-27 19:19:21,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3072, PETRI_PLACES=219, PETRI_TRANSITIONS=260} [2024-06-27 19:19:21,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-27 19:19:21,258 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 260 transitions, 3072 flow [2024-06-27 19:19:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:21,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:19:21,259 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:21,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2126529556, now seen corresponding path program 2 times [2024-06-27 19:19:21,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:21,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672413395] [2024-06-27 19:19:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:21,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:21,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672413395] [2024-06-27 19:19:21,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672413395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:21,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:21,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:21,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316977201] [2024-06-27 19:19:21,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:21,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:21,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:21,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:21,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 260 transitions, 3072 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:21,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:21,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:21,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:21,780 INFO L124 PetriNetUnfolderBase]: 1993/3382 cut-off events. [2024-06-27 19:19:21,780 INFO L125 PetriNetUnfolderBase]: For 101187/101190 co-relation queries the response was YES. [2024-06-27 19:19:21,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19304 conditions, 3382 events. 1993/3382 cut-off events. For 101187/101190 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20931 event pairs, 432 based on Foata normal form. 4/3383 useless extension candidates. Maximal degree in co-relation 19197. Up to 3100 conditions per place. [2024-06-27 19:19:21,807 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 249 selfloop transitions, 20 changer transitions 0/276 dead transitions. [2024-06-27 19:19:21,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 276 transitions, 3684 flow [2024-06-27 19:19:21,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-27 19:19:21,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-27 19:19:21,809 INFO L175 Difference]: Start difference. First operand has 219 places, 260 transitions, 3072 flow. Second operand 6 states and 135 transitions. [2024-06-27 19:19:21,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 276 transitions, 3684 flow [2024-06-27 19:19:22,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 276 transitions, 3605 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:22,211 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3082 flow [2024-06-27 19:19:22,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3007, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3082, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2024-06-27 19:19:22,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-27 19:19:22,212 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3082 flow [2024-06-27 19:19:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:22,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:22,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:22,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:19:22,213 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:22,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 299453396, now seen corresponding path program 3 times [2024-06-27 19:19:22,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:22,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829893442] [2024-06-27 19:19:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:22,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:22,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:22,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829893442] [2024-06-27 19:19:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829893442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:22,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:22,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049463507] [2024-06-27 19:19:22,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:22,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:22,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:22,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:22,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:22,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:22,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3082 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:22,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:22,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:22,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:22,828 INFO L124 PetriNetUnfolderBase]: 1988/3375 cut-off events. [2024-06-27 19:19:22,828 INFO L125 PetriNetUnfolderBase]: For 102338/102341 co-relation queries the response was YES. [2024-06-27 19:19:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19181 conditions, 3375 events. 1988/3375 cut-off events. For 102338/102341 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20906 event pairs, 400 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 19072. Up to 3078 conditions per place. [2024-06-27 19:19:22,854 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 252 selfloop transitions, 19 changer transitions 0/278 dead transitions. [2024-06-27 19:19:22,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 278 transitions, 3664 flow [2024-06-27 19:19:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 19:19:22,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-27 19:19:22,856 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3082 flow. Second operand 5 states and 121 transitions. [2024-06-27 19:19:22,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 278 transitions, 3664 flow [2024-06-27 19:19:23,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 278 transitions, 3593 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:23,172 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 3057 flow [2024-06-27 19:19:23,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3057, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-27 19:19:23,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-27 19:19:23,173 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 3057 flow [2024-06-27 19:19:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:23,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:19:23,174 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 842772394, now seen corresponding path program 1 times [2024-06-27 19:19:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:23,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064648] [2024-06-27 19:19:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:23,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:23,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:23,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064648] [2024-06-27 19:19:23,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243734032] [2024-06-27 19:19:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:23,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:23,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:23,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:23,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:23,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:23,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 3057 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:23,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:23,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:23,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:23,747 INFO L124 PetriNetUnfolderBase]: 2017/3421 cut-off events. [2024-06-27 19:19:23,747 INFO L125 PetriNetUnfolderBase]: For 109130/109130 co-relation queries the response was YES. [2024-06-27 19:19:23,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19616 conditions, 3421 events. 2017/3421 cut-off events. For 109130/109130 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 21244 event pairs, 448 based on Foata normal form. 1/3408 useless extension candidates. Maximal degree in co-relation 19506. Up to 2696 conditions per place. [2024-06-27 19:19:23,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 158 selfloop transitions, 144 changer transitions 0/309 dead transitions. [2024-06-27 19:19:23,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 309 transitions, 4219 flow [2024-06-27 19:19:23,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:19:23,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-27 19:19:23,776 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 3057 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:19:23,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 309 transitions, 4219 flow [2024-06-27 19:19:24,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 309 transitions, 4174 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:24,062 INFO L231 Difference]: Finished difference. Result has 228 places, 276 transitions, 3490 flow [2024-06-27 19:19:24,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3012, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3490, PETRI_PLACES=228, PETRI_TRANSITIONS=276} [2024-06-27 19:19:24,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 187 predicate places. [2024-06-27 19:19:24,063 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 276 transitions, 3490 flow [2024-06-27 19:19:24,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:24,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:24,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:24,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:19:24,063 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:24,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:24,064 INFO L85 PathProgramCache]: Analyzing trace with hash -665124496, now seen corresponding path program 2 times [2024-06-27 19:19:24,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:24,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370179507] [2024-06-27 19:19:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:24,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:24,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:24,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370179507] [2024-06-27 19:19:24,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370179507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:24,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:24,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:24,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79629228] [2024-06-27 19:19:24,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:24,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:24,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:24,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:24,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 276 transitions, 3490 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:24,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:24,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:24,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:24,799 INFO L124 PetriNetUnfolderBase]: 2027/3441 cut-off events. [2024-06-27 19:19:24,799 INFO L125 PetriNetUnfolderBase]: For 115607/115610 co-relation queries the response was YES. [2024-06-27 19:19:24,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20589 conditions, 3441 events. 2027/3441 cut-off events. For 115607/115610 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21390 event pairs, 437 based on Foata normal form. 3/3435 useless extension candidates. Maximal degree in co-relation 20478. Up to 2961 conditions per place. [2024-06-27 19:19:24,823 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 85 changer transitions 0/310 dead transitions. [2024-06-27 19:19:24,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 310 transitions, 4344 flow [2024-06-27 19:19:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:19:24,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-27 19:19:24,824 INFO L175 Difference]: Start difference. First operand has 228 places, 276 transitions, 3490 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:19:24,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 310 transitions, 4344 flow [2024-06-27 19:19:25,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 310 transitions, 4085 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:25,061 INFO L231 Difference]: Finished difference. Result has 232 places, 282 transitions, 3489 flow [2024-06-27 19:19:25,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3489, PETRI_PLACES=232, PETRI_TRANSITIONS=282} [2024-06-27 19:19:25,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-27 19:19:25,062 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 282 transitions, 3489 flow [2024-06-27 19:19:25,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:25,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:25,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:19:25,063 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:25,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:25,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1958847604, now seen corresponding path program 1 times [2024-06-27 19:19:25,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:25,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062391121] [2024-06-27 19:19:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:25,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:25,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:25,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:25,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062391121] [2024-06-27 19:19:25,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062391121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:25,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:25,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:25,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861317481] [2024-06-27 19:19:25,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:25,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:25,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:25,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:25,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:25,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 282 transitions, 3489 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:25,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:25,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:25,634 INFO L124 PetriNetUnfolderBase]: 2032/3460 cut-off events. [2024-06-27 19:19:25,635 INFO L125 PetriNetUnfolderBase]: For 120088/120103 co-relation queries the response was YES. [2024-06-27 19:19:25,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20617 conditions, 3460 events. 2032/3460 cut-off events. For 120088/120103 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21606 event pairs, 458 based on Foata normal form. 13/3467 useless extension candidates. Maximal degree in co-relation 20505. Up to 2970 conditions per place. [2024-06-27 19:19:25,666 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 228 selfloop transitions, 72 changer transitions 0/307 dead transitions. [2024-06-27 19:19:25,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 307 transitions, 4392 flow [2024-06-27 19:19:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:25,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:19:25,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:19:25,667 INFO L175 Difference]: Start difference. First operand has 232 places, 282 transitions, 3489 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:19:25,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 307 transitions, 4392 flow [2024-06-27 19:19:25,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 307 transitions, 4204 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:25,998 INFO L231 Difference]: Finished difference. Result has 234 places, 285 transitions, 3492 flow [2024-06-27 19:19:25,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3307, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3492, PETRI_PLACES=234, PETRI_TRANSITIONS=285} [2024-06-27 19:19:25,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-27 19:19:25,999 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 285 transitions, 3492 flow [2024-06-27 19:19:25,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:25,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:26,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:19:26,000 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:26,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash 475028968, now seen corresponding path program 2 times [2024-06-27 19:19:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:26,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651273426] [2024-06-27 19:19:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:26,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:26,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651273426] [2024-06-27 19:19:26,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651273426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:26,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:26,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:26,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726598498] [2024-06-27 19:19:26,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:26,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:26,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:26,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:26,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 285 transitions, 3492 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:26,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:26,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:26,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:26,565 INFO L124 PetriNetUnfolderBase]: 2068/3518 cut-off events. [2024-06-27 19:19:26,565 INFO L125 PetriNetUnfolderBase]: For 126973/126988 co-relation queries the response was YES. [2024-06-27 19:19:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21112 conditions, 3518 events. 2068/3518 cut-off events. For 126973/126988 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22022 event pairs, 458 based on Foata normal form. 13/3525 useless extension candidates. Maximal degree in co-relation 20999. Up to 3006 conditions per place. [2024-06-27 19:19:26,596 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 86 changer transitions 0/323 dead transitions. [2024-06-27 19:19:26,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 323 transitions, 4720 flow [2024-06-27 19:19:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:19:26,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:19:26,597 INFO L175 Difference]: Start difference. First operand has 234 places, 285 transitions, 3492 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:19:26,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 323 transitions, 4720 flow [2024-06-27 19:19:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 323 transitions, 4492 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:27,043 INFO L231 Difference]: Finished difference. Result has 237 places, 301 transitions, 3660 flow [2024-06-27 19:19:27,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3660, PETRI_PLACES=237, PETRI_TRANSITIONS=301} [2024-06-27 19:19:27,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-27 19:19:27,043 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 301 transitions, 3660 flow [2024-06-27 19:19:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:27,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:27,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:27,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:19:27,044 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:27,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash 475266118, now seen corresponding path program 3 times [2024-06-27 19:19:27,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:27,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914698469] [2024-06-27 19:19:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:27,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:27,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914698469] [2024-06-27 19:19:27,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914698469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:27,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:27,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89841111] [2024-06-27 19:19:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:27,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:27,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 301 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:27,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:27,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:27,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:27,652 INFO L124 PetriNetUnfolderBase]: 2065/3512 cut-off events. [2024-06-27 19:19:27,652 INFO L125 PetriNetUnfolderBase]: For 129430/129445 co-relation queries the response was YES. [2024-06-27 19:19:27,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21038 conditions, 3512 events. 2065/3512 cut-off events. For 129430/129445 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21974 event pairs, 458 based on Foata normal form. 13/3519 useless extension candidates. Maximal degree in co-relation 20924. Up to 3003 conditions per place. [2024-06-27 19:19:27,684 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 226 selfloop transitions, 89 changer transitions 0/322 dead transitions. [2024-06-27 19:19:27,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 322 transitions, 4574 flow [2024-06-27 19:19:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:19:27,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:19:27,685 INFO L175 Difference]: Start difference. First operand has 237 places, 301 transitions, 3660 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:19:27,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 322 transitions, 4574 flow [2024-06-27 19:19:27,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 322 transitions, 4463 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:27,975 INFO L231 Difference]: Finished difference. Result has 243 places, 303 transitions, 3777 flow [2024-06-27 19:19:27,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3549, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3777, PETRI_PLACES=243, PETRI_TRANSITIONS=303} [2024-06-27 19:19:27,976 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-27 19:19:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 303 transitions, 3777 flow [2024-06-27 19:19:27,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:27,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:27,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:27,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:19:27,976 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:27,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash 302538892, now seen corresponding path program 3 times [2024-06-27 19:19:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60904574] [2024-06-27 19:19:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:28,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60904574] [2024-06-27 19:19:28,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60904574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:28,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:28,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093295165] [2024-06-27 19:19:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:28,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:28,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 303 transitions, 3777 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:28,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:28,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:28,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:28,636 INFO L124 PetriNetUnfolderBase]: 2078/3523 cut-off events. [2024-06-27 19:19:28,636 INFO L125 PetriNetUnfolderBase]: For 134868/134871 co-relation queries the response was YES. [2024-06-27 19:19:28,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21352 conditions, 3523 events. 2078/3523 cut-off events. For 134868/134871 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 21941 event pairs, 442 based on Foata normal form. 3/3516 useless extension candidates. Maximal degree in co-relation 21236. Up to 3009 conditions per place. [2024-06-27 19:19:28,667 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 113 changer transitions 0/336 dead transitions. [2024-06-27 19:19:28,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 336 transitions, 4787 flow [2024-06-27 19:19:28,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:19:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:19:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:19:28,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:19:28,669 INFO L175 Difference]: Start difference. First operand has 243 places, 303 transitions, 3777 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:19:28,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 336 transitions, 4787 flow [2024-06-27 19:19:29,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 336 transitions, 4648 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:29,113 INFO L231 Difference]: Finished difference. Result has 250 places, 309 transitions, 3957 flow [2024-06-27 19:19:29,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3957, PETRI_PLACES=250, PETRI_TRANSITIONS=309} [2024-06-27 19:19:29,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-27 19:19:29,114 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 309 transitions, 3957 flow [2024-06-27 19:19:29,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:29,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:29,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:29,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:19:29,114 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:29,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 754234534, now seen corresponding path program 1 times [2024-06-27 19:19:29,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:29,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435429333] [2024-06-27 19:19:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435429333] [2024-06-27 19:19:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435429333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270875119] [2024-06-27 19:19:29,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:29,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:29,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:29,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 309 transitions, 3957 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:29,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:29,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:29,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:29,818 INFO L124 PetriNetUnfolderBase]: 2139/3624 cut-off events. [2024-06-27 19:19:29,818 INFO L125 PetriNetUnfolderBase]: For 157377/157389 co-relation queries the response was YES. [2024-06-27 19:19:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22230 conditions, 3624 events. 2139/3624 cut-off events. For 157377/157389 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 22614 event pairs, 364 based on Foata normal form. 16/3637 useless extension candidates. Maximal degree in co-relation 22112. Up to 3117 conditions per place. [2024-06-27 19:19:29,853 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 303 selfloop transitions, 35 changer transitions 0/345 dead transitions. [2024-06-27 19:19:29,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 345 transitions, 4919 flow [2024-06-27 19:19:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:29,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:19:29,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:19:29,855 INFO L175 Difference]: Start difference. First operand has 250 places, 309 transitions, 3957 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:19:29,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 345 transitions, 4919 flow [2024-06-27 19:19:30,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 345 transitions, 4666 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:19:30,209 INFO L231 Difference]: Finished difference. Result has 251 places, 314 transitions, 3853 flow [2024-06-27 19:19:30,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3704, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3853, PETRI_PLACES=251, PETRI_TRANSITIONS=314} [2024-06-27 19:19:30,209 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-27 19:19:30,209 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 314 transitions, 3853 flow [2024-06-27 19:19:30,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:30,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:30,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:19:30,210 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:30,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:30,211 INFO L85 PathProgramCache]: Analyzing trace with hash 474936712, now seen corresponding path program 2 times [2024-06-27 19:19:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:30,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56303034] [2024-06-27 19:19:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:30,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:30,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56303034] [2024-06-27 19:19:30,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56303034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:30,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:30,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:30,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704205287] [2024-06-27 19:19:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:30,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:30,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:30,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 314 transitions, 3853 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:30,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:30,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:30,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:30,847 INFO L124 PetriNetUnfolderBase]: 2213/3738 cut-off events. [2024-06-27 19:19:30,847 INFO L125 PetriNetUnfolderBase]: For 176216/176228 co-relation queries the response was YES. [2024-06-27 19:19:30,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23178 conditions, 3738 events. 2213/3738 cut-off events. For 176216/176228 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23445 event pairs, 463 based on Foata normal form. 16/3751 useless extension candidates. Maximal degree in co-relation 23060. Up to 3315 conditions per place. [2024-06-27 19:19:30,881 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 305 selfloop transitions, 33 changer transitions 0/345 dead transitions. [2024-06-27 19:19:30,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 345 transitions, 4797 flow [2024-06-27 19:19:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-27 19:19:30,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-27 19:19:30,882 INFO L175 Difference]: Start difference. First operand has 251 places, 314 transitions, 3853 flow. Second operand 7 states and 164 transitions. [2024-06-27 19:19:30,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 345 transitions, 4797 flow [2024-06-27 19:19:31,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 345 transitions, 4755 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-27 19:19:31,282 INFO L231 Difference]: Finished difference. Result has 257 places, 318 transitions, 3935 flow [2024-06-27 19:19:31,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3935, PETRI_PLACES=257, PETRI_TRANSITIONS=318} [2024-06-27 19:19:31,283 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-27 19:19:31,283 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 318 transitions, 3935 flow [2024-06-27 19:19:31,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:31,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:31,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:31,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:19:31,283 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:31,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash 475263142, now seen corresponding path program 3 times [2024-06-27 19:19:31,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:31,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895235243] [2024-06-27 19:19:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:31,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:31,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:31,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895235243] [2024-06-27 19:19:31,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895235243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:31,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:31,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382276013] [2024-06-27 19:19:31,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:31,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:31,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:31,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:31,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 318 transitions, 3935 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:31,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:31,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:31,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:31,916 INFO L124 PetriNetUnfolderBase]: 2195/3712 cut-off events. [2024-06-27 19:19:31,916 INFO L125 PetriNetUnfolderBase]: For 171881/171893 co-relation queries the response was YES. [2024-06-27 19:19:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3712 events. 2195/3712 cut-off events. For 171881/171893 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23297 event pairs, 461 based on Foata normal form. 18/3727 useless extension candidates. Maximal degree in co-relation 22752. Up to 3337 conditions per place. [2024-06-27 19:19:31,946 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 303 selfloop transitions, 31 changer transitions 0/341 dead transitions. [2024-06-27 19:19:31,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 341 transitions, 4697 flow [2024-06-27 19:19:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-27 19:19:31,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-27 19:19:31,947 INFO L175 Difference]: Start difference. First operand has 257 places, 318 transitions, 3935 flow. Second operand 7 states and 160 transitions. [2024-06-27 19:19:31,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 341 transitions, 4697 flow [2024-06-27 19:19:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 341 transitions, 4657 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:32,431 INFO L231 Difference]: Finished difference. Result has 261 places, 318 transitions, 3962 flow [2024-06-27 19:19:32,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3962, PETRI_PLACES=261, PETRI_TRANSITIONS=318} [2024-06-27 19:19:32,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 220 predicate places. [2024-06-27 19:19:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 318 transitions, 3962 flow [2024-06-27 19:19:32,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:32,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:32,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:32,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:19:32,432 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:32,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:32,433 INFO L85 PathProgramCache]: Analyzing trace with hash -417801354, now seen corresponding path program 4 times [2024-06-27 19:19:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:32,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643268297] [2024-06-27 19:19:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:32,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:32,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643268297] [2024-06-27 19:19:32,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643268297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:32,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185852142] [2024-06-27 19:19:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:32,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:32,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:32,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:32,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:32,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 318 transitions, 3962 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:32,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:32,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:32,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:33,135 INFO L124 PetriNetUnfolderBase]: 2240/3778 cut-off events. [2024-06-27 19:19:33,135 INFO L125 PetriNetUnfolderBase]: For 173285/173285 co-relation queries the response was YES. [2024-06-27 19:19:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23709 conditions, 3778 events. 2240/3778 cut-off events. For 173285/173285 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 23735 event pairs, 472 based on Foata normal form. 1/3770 useless extension candidates. Maximal degree in co-relation 23586. Up to 3204 conditions per place. [2024-06-27 19:19:33,170 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 124 changer transitions 0/369 dead transitions. [2024-06-27 19:19:33,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 369 transitions, 5178 flow [2024-06-27 19:19:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:33,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-27 19:19:33,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-27 19:19:33,171 INFO L175 Difference]: Start difference. First operand has 261 places, 318 transitions, 3962 flow. Second operand 10 states and 243 transitions. [2024-06-27 19:19:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 369 transitions, 5178 flow [2024-06-27 19:19:33,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 369 transitions, 5137 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:33,825 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4365 flow [2024-06-27 19:19:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4365, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-27 19:19:33,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-27 19:19:33,826 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4365 flow [2024-06-27 19:19:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:33,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:19:33,826 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:33,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1380524582, now seen corresponding path program 5 times [2024-06-27 19:19:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301960992] [2024-06-27 19:19:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:33,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301960992] [2024-06-27 19:19:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301960992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:33,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215011062] [2024-06-27 19:19:33,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:33,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:33,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:33,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:33,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4365 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:33,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:33,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:33,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:34,634 INFO L124 PetriNetUnfolderBase]: 2253/3798 cut-off events. [2024-06-27 19:19:34,634 INFO L125 PetriNetUnfolderBase]: For 181448/181448 co-relation queries the response was YES. [2024-06-27 19:19:34,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24357 conditions, 3798 events. 2253/3798 cut-off events. For 181448/181448 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23867 event pairs, 472 based on Foata normal form. 1/3790 useless extension candidates. Maximal degree in co-relation 24232. Up to 3219 conditions per place. [2024-06-27 19:19:34,664 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 132 changer transitions 0/373 dead transitions. [2024-06-27 19:19:34,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 373 transitions, 5518 flow [2024-06-27 19:19:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:19:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:19:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-27 19:19:34,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-27 19:19:34,665 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4365 flow. Second operand 11 states and 256 transitions. [2024-06-27 19:19:34,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 373 transitions, 5518 flow [2024-06-27 19:19:35,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 373 transitions, 5293 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:35,221 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 4505 flow [2024-06-27 19:19:35,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4162, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4505, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-27 19:19:35,222 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-27 19:19:35,222 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 4505 flow [2024-06-27 19:19:35,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:35,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:35,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:35,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:19:35,223 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:35,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash 121831368, now seen corresponding path program 6 times [2024-06-27 19:19:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944239589] [2024-06-27 19:19:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:35,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944239589] [2024-06-27 19:19:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944239589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:35,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:35,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604111653] [2024-06-27 19:19:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:35,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:35,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 4505 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:35,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:35,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:35,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:36,021 INFO L124 PetriNetUnfolderBase]: 2250/3796 cut-off events. [2024-06-27 19:19:36,021 INFO L125 PetriNetUnfolderBase]: For 184779/184779 co-relation queries the response was YES. [2024-06-27 19:19:36,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24544 conditions, 3796 events. 2250/3796 cut-off events. For 184779/184779 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23885 event pairs, 472 based on Foata normal form. 1/3788 useless extension candidates. Maximal degree in co-relation 24417. Up to 3216 conditions per place. [2024-06-27 19:19:36,055 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 126 changer transitions 0/367 dead transitions. [2024-06-27 19:19:36,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 367 transitions, 5541 flow [2024-06-27 19:19:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:19:36,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-27 19:19:36,060 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 4505 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:19:36,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 367 transitions, 5541 flow [2024-06-27 19:19:36,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 367 transitions, 5279 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:36,633 INFO L231 Difference]: Finished difference. Result has 276 places, 338 transitions, 4501 flow [2024-06-27 19:19:36,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4501, PETRI_PLACES=276, PETRI_TRANSITIONS=338} [2024-06-27 19:19:36,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 19:19:36,634 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 338 transitions, 4501 flow [2024-06-27 19:19:36,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:36,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:36,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:36,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:19:36,634 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:36,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1386065336, now seen corresponding path program 4 times [2024-06-27 19:19:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409624052] [2024-06-27 19:19:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:36,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409624052] [2024-06-27 19:19:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409624052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479614221] [2024-06-27 19:19:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:36,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:36,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:36,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 338 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:36,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:36,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:36,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:37,291 INFO L124 PetriNetUnfolderBase]: 2247/3799 cut-off events. [2024-06-27 19:19:37,292 INFO L125 PetriNetUnfolderBase]: For 189726/189741 co-relation queries the response was YES. [2024-06-27 19:19:37,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24544 conditions, 3799 events. 2247/3799 cut-off events. For 189726/189741 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23991 event pairs, 485 based on Foata normal form. 13/3806 useless extension candidates. Maximal degree in co-relation 24416. Up to 3315 conditions per place. [2024-06-27 19:19:37,328 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 278 selfloop transitions, 70 changer transitions 0/355 dead transitions. [2024-06-27 19:19:37,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 355 transitions, 5363 flow [2024-06-27 19:19:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:37,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:19:37,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:19:37,329 INFO L175 Difference]: Start difference. First operand has 276 places, 338 transitions, 4501 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:19:37,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 355 transitions, 5363 flow [2024-06-27 19:19:38,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 355 transitions, 5103 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:38,153 INFO L231 Difference]: Finished difference. Result has 275 places, 338 transitions, 4392 flow [2024-06-27 19:19:38,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4392, PETRI_PLACES=275, PETRI_TRANSITIONS=338} [2024-06-27 19:19:38,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-27 19:19:38,154 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 338 transitions, 4392 flow [2024-06-27 19:19:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:38,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:38,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:38,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:19:38,155 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:38,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash 278460364, now seen corresponding path program 7 times [2024-06-27 19:19:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:38,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708746657] [2024-06-27 19:19:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:38,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:38,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:38,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708746657] [2024-06-27 19:19:38,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708746657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:38,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:38,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:38,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863554345] [2024-06-27 19:19:38,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:38,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:38,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 338 transitions, 4392 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:38,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:38,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:38,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:38,989 INFO L124 PetriNetUnfolderBase]: 2244/3789 cut-off events. [2024-06-27 19:19:38,989 INFO L125 PetriNetUnfolderBase]: For 191723/191726 co-relation queries the response was YES. [2024-06-27 19:19:39,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24374 conditions, 3789 events. 2244/3789 cut-off events. For 191723/191726 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 23857 event pairs, 460 based on Foata normal form. 3/3787 useless extension candidates. Maximal degree in co-relation 24245. Up to 3376 conditions per place. [2024-06-27 19:19:39,026 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 298 selfloop transitions, 57 changer transitions 0/362 dead transitions. [2024-06-27 19:19:39,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 362 transitions, 5162 flow [2024-06-27 19:19:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:19:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:19:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:19:39,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:19:39,027 INFO L175 Difference]: Start difference. First operand has 275 places, 338 transitions, 4392 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:19:39,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 362 transitions, 5162 flow [2024-06-27 19:19:39,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 362 transitions, 5028 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:39,597 INFO L231 Difference]: Finished difference. Result has 278 places, 338 transitions, 4378 flow [2024-06-27 19:19:39,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4378, PETRI_PLACES=278, PETRI_TRANSITIONS=338} [2024-06-27 19:19:39,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-27 19:19:39,598 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 338 transitions, 4378 flow [2024-06-27 19:19:39,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:39,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:39,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:19:39,598 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1371734408, now seen corresponding path program 5 times [2024-06-27 19:19:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217577817] [2024-06-27 19:19:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:39,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:39,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217577817] [2024-06-27 19:19:39,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217577817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:39,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:39,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717971263] [2024-06-27 19:19:39,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:39,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:39,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:39,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 338 transitions, 4378 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:39,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:39,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:39,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:40,274 INFO L124 PetriNetUnfolderBase]: 2249/3804 cut-off events. [2024-06-27 19:19:40,274 INFO L125 PetriNetUnfolderBase]: For 198543/198558 co-relation queries the response was YES. [2024-06-27 19:19:40,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24501 conditions, 3804 events. 2249/3804 cut-off events. For 198543/198558 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24033 event pairs, 481 based on Foata normal form. 13/3811 useless extension candidates. Maximal degree in co-relation 24371. Up to 3317 conditions per place. [2024-06-27 19:19:40,312 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 268 selfloop transitions, 84 changer transitions 0/359 dead transitions. [2024-06-27 19:19:40,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 359 transitions, 5288 flow [2024-06-27 19:19:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:19:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:19:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 19:19:40,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:19:40,313 INFO L175 Difference]: Start difference. First operand has 278 places, 338 transitions, 4378 flow. Second operand 7 states and 165 transitions. [2024-06-27 19:19:40,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 359 transitions, 5288 flow [2024-06-27 19:19:41,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 359 transitions, 5170 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:41,024 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 4472 flow [2024-06-27 19:19:41,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4472, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2024-06-27 19:19:41,024 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-27 19:19:41,024 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 4472 flow [2024-06-27 19:19:41,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:41,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:41,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:41,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:19:41,025 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:41,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 917794630, now seen corresponding path program 6 times [2024-06-27 19:19:41,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:41,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689123362] [2024-06-27 19:19:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:41,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689123362] [2024-06-27 19:19:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689123362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:41,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:41,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:41,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889795992] [2024-06-27 19:19:41,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:41,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:41,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 4472 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:41,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:41,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:41,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:41,667 INFO L124 PetriNetUnfolderBase]: 2246/3800 cut-off events. [2024-06-27 19:19:41,667 INFO L125 PetriNetUnfolderBase]: For 202371/202386 co-relation queries the response was YES. [2024-06-27 19:19:41,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24573 conditions, 3800 events. 2246/3800 cut-off events. For 202371/202386 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24025 event pairs, 485 based on Foata normal form. 13/3807 useless extension candidates. Maximal degree in co-relation 24442. Up to 3314 conditions per place. [2024-06-27 19:19:41,705 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 276 selfloop transitions, 73 changer transitions 0/356 dead transitions. [2024-06-27 19:19:41,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 356 transitions, 5208 flow [2024-06-27 19:19:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:19:41,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:19:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 19:19:41,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:19:41,706 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 4472 flow. Second operand 5 states and 125 transitions. [2024-06-27 19:19:41,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 356 transitions, 5208 flow [2024-06-27 19:19:42,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 356 transitions, 5030 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:42,327 INFO L231 Difference]: Finished difference. Result has 279 places, 341 transitions, 4460 flow [2024-06-27 19:19:42,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4460, PETRI_PLACES=279, PETRI_TRANSITIONS=341} [2024-06-27 19:19:42,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-27 19:19:42,327 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 341 transitions, 4460 flow [2024-06-27 19:19:42,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:42,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:42,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:19:42,328 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:42,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash 917800024, now seen corresponding path program 8 times [2024-06-27 19:19:42,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:42,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201384180] [2024-06-27 19:19:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:42,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:42,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:42,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:42,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201384180] [2024-06-27 19:19:42,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201384180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:42,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:42,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:42,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323718568] [2024-06-27 19:19:42,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:42,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:42,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:42,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 341 transitions, 4460 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:42,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:42,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:42,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:43,064 INFO L124 PetriNetUnfolderBase]: 2264/3825 cut-off events. [2024-06-27 19:19:43,064 INFO L125 PetriNetUnfolderBase]: For 203591/203594 co-relation queries the response was YES. [2024-06-27 19:19:43,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24811 conditions, 3825 events. 2264/3825 cut-off events. For 203591/203594 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24098 event pairs, 460 based on Foata normal form. 3/3823 useless extension candidates. Maximal degree in co-relation 24680. Up to 3393 conditions per place. [2024-06-27 19:19:43,101 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 300 selfloop transitions, 70 changer transitions 0/377 dead transitions. [2024-06-27 19:19:43,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 377 transitions, 5529 flow [2024-06-27 19:19:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-27 19:19:43,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-27 19:19:43,102 INFO L175 Difference]: Start difference. First operand has 279 places, 341 transitions, 4460 flow. Second operand 10 states and 226 transitions. [2024-06-27 19:19:43,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 377 transitions, 5529 flow [2024-06-27 19:19:43,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 377 transitions, 5352 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:43,751 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4590 flow [2024-06-27 19:19:43,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4293, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4590, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-27 19:19:43,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-27 19:19:43,751 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4590 flow [2024-06-27 19:19:43,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:43,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:19:43,752 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:43,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash 131205768, now seen corresponding path program 9 times [2024-06-27 19:19:43,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:43,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065471415] [2024-06-27 19:19:43,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:43,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065471415] [2024-06-27 19:19:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065471415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:43,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:43,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:43,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793192965] [2024-06-27 19:19:43,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:43,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:43,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:43,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:43,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:43,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4590 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:43,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:43,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:43,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:44,540 INFO L124 PetriNetUnfolderBase]: 2261/3821 cut-off events. [2024-06-27 19:19:44,541 INFO L125 PetriNetUnfolderBase]: For 195512/195515 co-relation queries the response was YES. [2024-06-27 19:19:44,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24643 conditions, 3821 events. 2261/3821 cut-off events. For 195512/195515 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24116 event pairs, 460 based on Foata normal form. 3/3819 useless extension candidates. Maximal degree in co-relation 24512. Up to 3390 conditions per place. [2024-06-27 19:19:44,575 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 70 changer transitions 0/378 dead transitions. [2024-06-27 19:19:44,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 378 transitions, 5400 flow [2024-06-27 19:19:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:19:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:19:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-27 19:19:44,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 19:19:44,576 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4590 flow. Second operand 12 states and 261 transitions. [2024-06-27 19:19:44,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 378 transitions, 5400 flow [2024-06-27 19:19:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 378 transitions, 5262 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:45,233 INFO L231 Difference]: Finished difference. Result has 291 places, 350 transitions, 4598 flow [2024-06-27 19:19:45,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4598, PETRI_PLACES=291, PETRI_TRANSITIONS=350} [2024-06-27 19:19:45,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-27 19:19:45,233 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 350 transitions, 4598 flow [2024-06-27 19:19:45,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:45,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:45,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:19:45,234 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:45,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash -184183002, now seen corresponding path program 7 times [2024-06-27 19:19:45,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:45,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983400513] [2024-06-27 19:19:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:45,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:45,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:45,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983400513] [2024-06-27 19:19:45,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983400513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:45,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:45,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445572246] [2024-06-27 19:19:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:45,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:45,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 350 transitions, 4598 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:45,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:45,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:45,886 INFO L124 PetriNetUnfolderBase]: 2274/3847 cut-off events. [2024-06-27 19:19:45,886 INFO L125 PetriNetUnfolderBase]: For 204621/204636 co-relation queries the response was YES. [2024-06-27 19:19:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24880 conditions, 3847 events. 2274/3847 cut-off events. For 204621/204636 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24367 event pairs, 485 based on Foata normal form. 13/3854 useless extension candidates. Maximal degree in co-relation 24748. Up to 3309 conditions per place. [2024-06-27 19:19:45,923 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 265 selfloop transitions, 102 changer transitions 0/374 dead transitions. [2024-06-27 19:19:45,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 374 transitions, 5690 flow [2024-06-27 19:19:45,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 19:19:45,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:19:45,924 INFO L175 Difference]: Start difference. First operand has 291 places, 350 transitions, 4598 flow. Second operand 6 states and 145 transitions. [2024-06-27 19:19:45,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 374 transitions, 5690 flow [2024-06-27 19:19:46,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 374 transitions, 5518 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-27 19:19:46,626 INFO L231 Difference]: Finished difference. Result has 285 places, 356 transitions, 4694 flow [2024-06-27 19:19:46,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4694, PETRI_PLACES=285, PETRI_TRANSITIONS=356} [2024-06-27 19:19:46,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-27 19:19:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 356 transitions, 4694 flow [2024-06-27 19:19:46,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:46,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:46,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:46,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:19:46,627 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:46,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash 698480984, now seen corresponding path program 10 times [2024-06-27 19:19:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065114720] [2024-06-27 19:19:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:46,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:46,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065114720] [2024-06-27 19:19:46,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065114720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:46,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:46,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:46,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910061754] [2024-06-27 19:19:46,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:46,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:46,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:46,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:46,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:46,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 356 transitions, 4694 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:46,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:46,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:46,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:47,450 INFO L124 PetriNetUnfolderBase]: 2292/3872 cut-off events. [2024-06-27 19:19:47,451 INFO L125 PetriNetUnfolderBase]: For 212007/212010 co-relation queries the response was YES. [2024-06-27 19:19:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25300 conditions, 3872 events. 2292/3872 cut-off events. For 212007/212010 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24517 event pairs, 460 based on Foata normal form. 3/3870 useless extension candidates. Maximal degree in co-relation 25167. Up to 3449 conditions per place. [2024-06-27 19:19:47,484 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 318 selfloop transitions, 62 changer transitions 0/387 dead transitions. [2024-06-27 19:19:47,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 387 transitions, 5783 flow [2024-06-27 19:19:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:19:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:19:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-27 19:19:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-27 19:19:47,485 INFO L175 Difference]: Start difference. First operand has 285 places, 356 transitions, 4694 flow. Second operand 11 states and 234 transitions. [2024-06-27 19:19:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 387 transitions, 5783 flow [2024-06-27 19:19:48,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 387 transitions, 5665 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:19:48,181 INFO L231 Difference]: Finished difference. Result has 295 places, 365 transitions, 4879 flow [2024-06-27 19:19:48,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4580, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4879, PETRI_PLACES=295, PETRI_TRANSITIONS=365} [2024-06-27 19:19:48,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-27 19:19:48,182 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 365 transitions, 4879 flow [2024-06-27 19:19:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:48,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:48,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:19:48,182 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:48,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1327315592, now seen corresponding path program 11 times [2024-06-27 19:19:48,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:48,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849574647] [2024-06-27 19:19:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:48,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:48,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:48,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849574647] [2024-06-27 19:19:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849574647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:48,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:48,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:48,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522331122] [2024-06-27 19:19:48,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:48,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 365 transitions, 4879 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:48,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:48,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:48,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:49,037 INFO L124 PetriNetUnfolderBase]: 2289/3868 cut-off events. [2024-06-27 19:19:49,037 INFO L125 PetriNetUnfolderBase]: For 210057/210060 co-relation queries the response was YES. [2024-06-27 19:19:49,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25205 conditions, 3868 events. 2289/3868 cut-off events. For 210057/210060 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 24509 event pairs, 460 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 25070. Up to 3446 conditions per place. [2024-06-27 19:19:49,077 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 62 changer transitions 0/385 dead transitions. [2024-06-27 19:19:49,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 385 transitions, 5683 flow [2024-06-27 19:19:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-27 19:19:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 19:19:49,078 INFO L175 Difference]: Start difference. First operand has 295 places, 365 transitions, 4879 flow. Second operand 10 states and 216 transitions. [2024-06-27 19:19:49,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 385 transitions, 5683 flow [2024-06-27 19:19:49,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 385 transitions, 5521 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:49,623 INFO L231 Difference]: Finished difference. Result has 298 places, 365 transitions, 4847 flow [2024-06-27 19:19:49,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4717, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4847, PETRI_PLACES=298, PETRI_TRANSITIONS=365} [2024-06-27 19:19:49,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-27 19:19:49,624 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 365 transitions, 4847 flow [2024-06-27 19:19:49,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:49,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:49,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:49,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:19:49,624 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:49,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1387422042, now seen corresponding path program 12 times [2024-06-27 19:19:49,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:49,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096765277] [2024-06-27 19:19:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:49,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:49,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:49,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096765277] [2024-06-27 19:19:49,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096765277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:49,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:49,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:19:49,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198185559] [2024-06-27 19:19:49,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:49,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:19:49,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:49,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:19:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:19:49,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:49,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 365 transitions, 4847 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:49,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:49,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:49,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:50,455 INFO L124 PetriNetUnfolderBase]: 2317/3908 cut-off events. [2024-06-27 19:19:50,455 INFO L125 PetriNetUnfolderBase]: For 218832/218835 co-relation queries the response was YES. [2024-06-27 19:19:50,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25622 conditions, 3908 events. 2317/3908 cut-off events. For 218832/218835 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 24769 event pairs, 472 based on Foata normal form. 3/3899 useless extension candidates. Maximal degree in co-relation 25486. Up to 3312 conditions per place. [2024-06-27 19:19:50,492 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 162 changer transitions 0/403 dead transitions. [2024-06-27 19:19:50,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 403 transitions, 6333 flow [2024-06-27 19:19:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:19:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:19:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-27 19:19:50,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-27 19:19:50,494 INFO L175 Difference]: Start difference. First operand has 298 places, 365 transitions, 4847 flow. Second operand 10 states and 223 transitions. [2024-06-27 19:19:50,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 403 transitions, 6333 flow [2024-06-27 19:19:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 6209 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:19:51,361 INFO L231 Difference]: Finished difference. Result has 301 places, 380 transitions, 5342 flow [2024-06-27 19:19:51,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5342, PETRI_PLACES=301, PETRI_TRANSITIONS=380} [2024-06-27 19:19:51,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-27 19:19:51,362 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 380 transitions, 5342 flow [2024-06-27 19:19:51,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:51,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:51,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:51,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:19:51,363 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:51,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash 118364574, now seen corresponding path program 8 times [2024-06-27 19:19:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:51,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029380190] [2024-06-27 19:19:51,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:51,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:51,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029380190] [2024-06-27 19:19:51,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029380190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:51,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:51,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153836048] [2024-06-27 19:19:51,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:51,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:51,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:51,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 380 transitions, 5342 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:51,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:51,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:51,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:52,129 INFO L124 PetriNetUnfolderBase]: 2314/3917 cut-off events. [2024-06-27 19:19:52,129 INFO L125 PetriNetUnfolderBase]: For 224597/224612 co-relation queries the response was YES. [2024-06-27 19:19:52,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25966 conditions, 3917 events. 2314/3917 cut-off events. For 224597/224612 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24965 event pairs, 485 based on Foata normal form. 13/3924 useless extension candidates. Maximal degree in co-relation 25827. Up to 3352 conditions per place. [2024-06-27 19:19:52,170 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 285 selfloop transitions, 108 changer transitions 0/400 dead transitions. [2024-06-27 19:19:52,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 400 transitions, 6314 flow [2024-06-27 19:19:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:19:52,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:19:52,171 INFO L175 Difference]: Start difference. First operand has 301 places, 380 transitions, 5342 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:19:52,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 400 transitions, 6314 flow [2024-06-27 19:19:52,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 400 transitions, 6011 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:19:52,994 INFO L231 Difference]: Finished difference. Result has 302 places, 380 transitions, 5270 flow [2024-06-27 19:19:52,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5270, PETRI_PLACES=302, PETRI_TRANSITIONS=380} [2024-06-27 19:19:52,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-27 19:19:52,994 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 380 transitions, 5270 flow [2024-06-27 19:19:52,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:52,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:52,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:52,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:19:52,995 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:52,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 9 times [2024-06-27 19:19:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000973722] [2024-06-27 19:19:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000973722] [2024-06-27 19:19:53,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000973722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:53,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:53,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:53,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731907801] [2024-06-27 19:19:53,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:53,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:53,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:53,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:53,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:53,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 380 transitions, 5270 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:53,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:53,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:53,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:53,672 INFO L124 PetriNetUnfolderBase]: 2311/3910 cut-off events. [2024-06-27 19:19:53,672 INFO L125 PetriNetUnfolderBase]: For 228897/228906 co-relation queries the response was YES. [2024-06-27 19:19:53,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25838 conditions, 3910 events. 2311/3910 cut-off events. For 228897/228906 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24896 event pairs, 518 based on Foata normal form. 5/3907 useless extension candidates. Maximal degree in co-relation 25699. Up to 3349 conditions per place. [2024-06-27 19:19:53,713 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 270 selfloop transitions, 113 changer transitions 0/390 dead transitions. [2024-06-27 19:19:53,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 390 transitions, 6060 flow [2024-06-27 19:19:53,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-27 19:19:53,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:19:53,714 INFO L175 Difference]: Start difference. First operand has 302 places, 380 transitions, 5270 flow. Second operand 6 states and 138 transitions. [2024-06-27 19:19:53,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 390 transitions, 6060 flow [2024-06-27 19:19:54,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 390 transitions, 5839 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:19:54,346 INFO L231 Difference]: Finished difference. Result has 302 places, 380 transitions, 5281 flow [2024-06-27 19:19:54,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5049, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5281, PETRI_PLACES=302, PETRI_TRANSITIONS=380} [2024-06-27 19:19:54,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-27 19:19:54,346 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 380 transitions, 5281 flow [2024-06-27 19:19:54,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:54,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:54,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:54,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:19:54,347 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:54,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 705715454, now seen corresponding path program 4 times [2024-06-27 19:19:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967878299] [2024-06-27 19:19:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:54,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967878299] [2024-06-27 19:19:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967878299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:54,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:54,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:54,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30637204] [2024-06-27 19:19:54,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:54,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:54,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:54,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:54,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:54,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:54,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 380 transitions, 5281 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:54,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:54,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:54,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:55,062 INFO L124 PetriNetUnfolderBase]: 2339/3951 cut-off events. [2024-06-27 19:19:55,062 INFO L125 PetriNetUnfolderBase]: For 239036/239042 co-relation queries the response was YES. [2024-06-27 19:19:55,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25931 conditions, 3951 events. 2339/3951 cut-off events. For 239036/239042 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 25087 event pairs, 474 based on Foata normal form. 10/3956 useless extension candidates. Maximal degree in co-relation 25793. Up to 3540 conditions per place. [2024-06-27 19:19:55,118 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 355 selfloop transitions, 35 changer transitions 0/397 dead transitions. [2024-06-27 19:19:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 397 transitions, 6149 flow [2024-06-27 19:19:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 19:19:55,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-27 19:19:55,120 INFO L175 Difference]: Start difference. First operand has 302 places, 380 transitions, 5281 flow. Second operand 6 states and 137 transitions. [2024-06-27 19:19:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 397 transitions, 6149 flow [2024-06-27 19:19:55,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 397 transitions, 5760 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:19:55,879 INFO L231 Difference]: Finished difference. Result has 301 places, 381 transitions, 4980 flow [2024-06-27 19:19:55,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4892, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4980, PETRI_PLACES=301, PETRI_TRANSITIONS=381} [2024-06-27 19:19:55,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-27 19:19:55,879 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 381 transitions, 4980 flow [2024-06-27 19:19:55,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:55,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:55,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:55,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:19:55,880 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:55,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:55,880 INFO L85 PathProgramCache]: Analyzing trace with hash 694990694, now seen corresponding path program 5 times [2024-06-27 19:19:55,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:55,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863848307] [2024-06-27 19:19:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:55,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863848307] [2024-06-27 19:19:55,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863848307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:55,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106293235] [2024-06-27 19:19:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:56,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:56,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 381 transitions, 4980 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:56,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:56,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:56,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:56,569 INFO L124 PetriNetUnfolderBase]: 2354/3983 cut-off events. [2024-06-27 19:19:56,569 INFO L125 PetriNetUnfolderBase]: For 238260/238272 co-relation queries the response was YES. [2024-06-27 19:19:56,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25774 conditions, 3983 events. 2354/3983 cut-off events. For 238260/238272 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25385 event pairs, 470 based on Foata normal form. 18/3998 useless extension candidates. Maximal degree in co-relation 25636. Up to 3533 conditions per place. [2024-06-27 19:19:56,609 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 362 selfloop transitions, 35 changer transitions 0/404 dead transitions. [2024-06-27 19:19:56,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 404 transitions, 5880 flow [2024-06-27 19:19:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 19:19:56,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 19:19:56,610 INFO L175 Difference]: Start difference. First operand has 301 places, 381 transitions, 4980 flow. Second operand 6 states and 142 transitions. [2024-06-27 19:19:56,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 404 transitions, 5880 flow [2024-06-27 19:19:57,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 5809 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:57,405 INFO L231 Difference]: Finished difference. Result has 303 places, 382 transitions, 5002 flow [2024-06-27 19:19:57,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4909, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5002, PETRI_PLACES=303, PETRI_TRANSITIONS=382} [2024-06-27 19:19:57,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 19:19:57,406 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 382 transitions, 5002 flow [2024-06-27 19:19:57,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:57,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:57,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:57,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:19:57,407 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:57,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash 694664264, now seen corresponding path program 6 times [2024-06-27 19:19:57,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:57,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659394025] [2024-06-27 19:19:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:57,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:57,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:57,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659394025] [2024-06-27 19:19:57,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659394025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:57,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:57,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:57,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364438905] [2024-06-27 19:19:57,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:57,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:57,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:57,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:57,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 382 transitions, 5002 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:57,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:57,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:57,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:58,118 INFO L124 PetriNetUnfolderBase]: 2341/3964 cut-off events. [2024-06-27 19:19:58,118 INFO L125 PetriNetUnfolderBase]: For 224992/225004 co-relation queries the response was YES. [2024-06-27 19:19:58,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25392 conditions, 3964 events. 2341/3964 cut-off events. For 224992/225004 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 25256 event pairs, 364 based on Foata normal form. 16/3977 useless extension candidates. Maximal degree in co-relation 25253. Up to 3326 conditions per place. [2024-06-27 19:19:58,156 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 360 selfloop transitions, 43 changer transitions 0/410 dead transitions. [2024-06-27 19:19:58,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 410 transitions, 5925 flow [2024-06-27 19:19:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:19:58,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:19:58,157 INFO L175 Difference]: Start difference. First operand has 303 places, 382 transitions, 5002 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:19:58,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 410 transitions, 5925 flow [2024-06-27 19:19:59,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 410 transitions, 5851 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:19:59,018 INFO L231 Difference]: Finished difference. Result has 305 places, 382 transitions, 5022 flow [2024-06-27 19:19:59,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5022, PETRI_PLACES=305, PETRI_TRANSITIONS=382} [2024-06-27 19:19:59,019 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-27 19:19:59,019 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 382 transitions, 5022 flow [2024-06-27 19:19:59,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:59,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:19:59,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:19:59,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:19:59,020 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:19:59,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:19:59,020 INFO L85 PathProgramCache]: Analyzing trace with hash 706115168, now seen corresponding path program 1 times [2024-06-27 19:19:59,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:19:59,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399466588] [2024-06-27 19:19:59,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:19:59,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:19:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:19:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:19:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:19:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399466588] [2024-06-27 19:19:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399466588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:19:59,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:19:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:19:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550164166] [2024-06-27 19:19:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:19:59,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:19:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:19:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:19:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:19:59,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:19:59,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 382 transitions, 5022 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:19:59,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:19:59,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:19:59,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:19:59,718 INFO L124 PetriNetUnfolderBase]: 2361/3995 cut-off events. [2024-06-27 19:19:59,718 INFO L125 PetriNetUnfolderBase]: For 225988/225994 co-relation queries the response was YES. [2024-06-27 19:19:59,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25585 conditions, 3995 events. 2361/3995 cut-off events. For 225988/225994 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25520 event pairs, 470 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 25446. Up to 3478 conditions per place. [2024-06-27 19:19:59,758 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 358 selfloop transitions, 40 changer transitions 0/405 dead transitions. [2024-06-27 19:19:59,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 405 transitions, 5935 flow [2024-06-27 19:19:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:19:59,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:19:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-27 19:19:59,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:19:59,760 INFO L175 Difference]: Start difference. First operand has 305 places, 382 transitions, 5022 flow. Second operand 6 states and 140 transitions. [2024-06-27 19:19:59,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 405 transitions, 5935 flow [2024-06-27 19:20:00,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 405 transitions, 5841 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:00,461 INFO L231 Difference]: Finished difference. Result has 306 places, 386 transitions, 5057 flow [2024-06-27 19:20:00,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5057, PETRI_PLACES=306, PETRI_TRANSITIONS=386} [2024-06-27 19:20:00,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-27 19:20:00,461 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 386 transitions, 5057 flow [2024-06-27 19:20:00,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:00,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:00,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:00,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:20:00,462 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:00,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:00,462 INFO L85 PathProgramCache]: Analyzing trace with hash -509720218, now seen corresponding path program 13 times [2024-06-27 19:20:00,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608346134] [2024-06-27 19:20:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:00,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:00,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608346134] [2024-06-27 19:20:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608346134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:00,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:00,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676494624] [2024-06-27 19:20:00,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:00,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:00,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 386 transitions, 5057 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:00,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:00,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:01,233 INFO L124 PetriNetUnfolderBase]: 2390/4049 cut-off events. [2024-06-27 19:20:01,233 INFO L125 PetriNetUnfolderBase]: For 215726/215741 co-relation queries the response was YES. [2024-06-27 19:20:01,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26022 conditions, 4049 events. 2390/4049 cut-off events. For 215726/215741 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 25997 event pairs, 493 based on Foata normal form. 13/4056 useless extension candidates. Maximal degree in co-relation 25883. Up to 3215 conditions per place. [2024-06-27 19:20:01,274 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 176 changer transitions 0/429 dead transitions. [2024-06-27 19:20:01,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 429 transitions, 6409 flow [2024-06-27 19:20:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:01,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 19:20:01,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:20:01,275 INFO L175 Difference]: Start difference. First operand has 306 places, 386 transitions, 5057 flow. Second operand 9 states and 219 transitions. [2024-06-27 19:20:01,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 429 transitions, 6409 flow [2024-06-27 19:20:01,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 429 transitions, 6363 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:02,001 INFO L231 Difference]: Finished difference. Result has 314 places, 396 transitions, 5593 flow [2024-06-27 19:20:02,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5011, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5593, PETRI_PLACES=314, PETRI_TRANSITIONS=396} [2024-06-27 19:20:02,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-27 19:20:02,001 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 396 transitions, 5593 flow [2024-06-27 19:20:02,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:02,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:02,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:20:02,002 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:02,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:02,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1143367704, now seen corresponding path program 14 times [2024-06-27 19:20:02,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:02,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928363691] [2024-06-27 19:20:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:02,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:02,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:02,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928363691] [2024-06-27 19:20:02,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928363691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:02,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:02,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:02,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219420382] [2024-06-27 19:20:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:02,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:02,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:02,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:02,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:02,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 396 transitions, 5593 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:02,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:02,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:02,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:02,832 INFO L124 PetriNetUnfolderBase]: 2395/4058 cut-off events. [2024-06-27 19:20:02,832 INFO L125 PetriNetUnfolderBase]: For 223439/223454 co-relation queries the response was YES. [2024-06-27 19:20:02,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 4058 events. 2395/4058 cut-off events. For 223439/223454 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26037 event pairs, 493 based on Foata normal form. 13/4065 useless extension candidates. Maximal degree in co-relation 26687. Up to 3219 conditions per place. [2024-06-27 19:20:02,876 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 247 selfloop transitions, 180 changer transitions 0/434 dead transitions. [2024-06-27 19:20:02,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 434 transitions, 6872 flow [2024-06-27 19:20:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:20:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:20:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-27 19:20:02,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-27 19:20:02,878 INFO L175 Difference]: Start difference. First operand has 314 places, 396 transitions, 5593 flow. Second operand 11 states and 255 transitions. [2024-06-27 19:20:02,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 434 transitions, 6872 flow [2024-06-27 19:20:03,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 434 transitions, 6471 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:03,599 INFO L231 Difference]: Finished difference. Result has 320 places, 399 transitions, 5617 flow [2024-06-27 19:20:03,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5617, PETRI_PLACES=320, PETRI_TRANSITIONS=399} [2024-06-27 19:20:03,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-27 19:20:03,600 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 399 transitions, 5617 flow [2024-06-27 19:20:03,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:03,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:03,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:03,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:20:03,600 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:03,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:03,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1311661730, now seen corresponding path program 15 times [2024-06-27 19:20:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:03,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121241445] [2024-06-27 19:20:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:03,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:03,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:03,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121241445] [2024-06-27 19:20:03,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121241445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:03,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:03,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:03,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019082281] [2024-06-27 19:20:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:03,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:03,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:03,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:03,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:03,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 399 transitions, 5617 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:03,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:03,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:03,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:04,399 INFO L124 PetriNetUnfolderBase]: 2421/4102 cut-off events. [2024-06-27 19:20:04,399 INFO L125 PetriNetUnfolderBase]: For 236631/236646 co-relation queries the response was YES. [2024-06-27 19:20:04,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27197 conditions, 4102 events. 2421/4102 cut-off events. For 236631/236646 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 26425 event pairs, 493 based on Foata normal form. 14/4110 useless extension candidates. Maximal degree in co-relation 27054. Up to 3244 conditions per place. [2024-06-27 19:20:04,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 187 changer transitions 0/437 dead transitions. [2024-06-27 19:20:04,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 437 transitions, 6957 flow [2024-06-27 19:20:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-27 19:20:04,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-27 19:20:04,445 INFO L175 Difference]: Start difference. First operand has 320 places, 399 transitions, 5617 flow. Second operand 10 states and 232 transitions. [2024-06-27 19:20:04,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 437 transitions, 6957 flow [2024-06-27 19:20:05,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 437 transitions, 6565 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 19:20:05,242 INFO L231 Difference]: Finished difference. Result has 321 places, 408 transitions, 5716 flow [2024-06-27 19:20:05,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5243, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5716, PETRI_PLACES=321, PETRI_TRANSITIONS=408} [2024-06-27 19:20:05,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-27 19:20:05,242 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 408 transitions, 5716 flow [2024-06-27 19:20:05,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:05,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:05,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:20:05,243 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:05,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1048377732, now seen corresponding path program 16 times [2024-06-27 19:20:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:05,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260751689] [2024-06-27 19:20:05,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:05,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:05,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:05,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260751689] [2024-06-27 19:20:05,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260751689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:05,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:05,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:05,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138359711] [2024-06-27 19:20:05,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:05,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:05,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:05,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:05,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:05,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:05,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 408 transitions, 5716 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:05,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:05,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:05,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:06,140 INFO L124 PetriNetUnfolderBase]: 2458/4152 cut-off events. [2024-06-27 19:20:06,140 INFO L125 PetriNetUnfolderBase]: For 249878/249878 co-relation queries the response was YES. [2024-06-27 19:20:06,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 4152 events. 2458/4152 cut-off events. For 249878/249878 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26673 event pairs, 480 based on Foata normal form. 1/4144 useless extension candidates. Maximal degree in co-relation 27821. Up to 3275 conditions per place. [2024-06-27 19:20:06,177 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 214 selfloop transitions, 238 changer transitions 0/459 dead transitions. [2024-06-27 19:20:06,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 459 transitions, 7486 flow [2024-06-27 19:20:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-27 19:20:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-27 19:20:06,178 INFO L175 Difference]: Start difference. First operand has 321 places, 408 transitions, 5716 flow. Second operand 10 states and 247 transitions. [2024-06-27 19:20:06,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 459 transitions, 7486 flow [2024-06-27 19:20:06,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 459 transitions, 7170 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:06,983 INFO L231 Difference]: Finished difference. Result has 325 places, 420 transitions, 6080 flow [2024-06-27 19:20:06,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6080, PETRI_PLACES=325, PETRI_TRANSITIONS=420} [2024-06-27 19:20:06,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 19:20:06,984 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 420 transitions, 6080 flow [2024-06-27 19:20:06,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:06,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:06,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:06,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:20:06,985 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:06,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:06,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1632261560, now seen corresponding path program 17 times [2024-06-27 19:20:06,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929243548] [2024-06-27 19:20:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:06,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:07,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:07,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929243548] [2024-06-27 19:20:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929243548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:07,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:07,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302020356] [2024-06-27 19:20:07,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:07,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:07,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:07,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:07,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 420 transitions, 6080 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:07,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:07,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:07,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:07,805 INFO L124 PetriNetUnfolderBase]: 2455/4148 cut-off events. [2024-06-27 19:20:07,805 INFO L125 PetriNetUnfolderBase]: For 254234/254234 co-relation queries the response was YES. [2024-06-27 19:20:07,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28118 conditions, 4148 events. 2455/4148 cut-off events. For 254234/254234 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26624 event pairs, 480 based on Foata normal form. 1/4140 useless extension candidates. Maximal degree in co-relation 27973. Up to 3273 conditions per place. [2024-06-27 19:20:07,855 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 232 changer transitions 0/451 dead transitions. [2024-06-27 19:20:07,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 451 transitions, 7502 flow [2024-06-27 19:20:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:20:07,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:07,858 INFO L175 Difference]: Start difference. First operand has 325 places, 420 transitions, 6080 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:20:07,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 451 transitions, 7502 flow [2024-06-27 19:20:08,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 451 transitions, 6978 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:08,767 INFO L231 Difference]: Finished difference. Result has 326 places, 421 transitions, 6058 flow [2024-06-27 19:20:08,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6058, PETRI_PLACES=326, PETRI_TRANSITIONS=421} [2024-06-27 19:20:08,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-27 19:20:08,767 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 421 transitions, 6058 flow [2024-06-27 19:20:08,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:08,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:08,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:20:08,768 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:08,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:08,768 INFO L85 PathProgramCache]: Analyzing trace with hash -274428176, now seen corresponding path program 18 times [2024-06-27 19:20:08,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:08,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015977319] [2024-06-27 19:20:08,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:08,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:08,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:08,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015977319] [2024-06-27 19:20:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015977319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:08,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571171036] [2024-06-27 19:20:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:08,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:08,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 421 transitions, 6058 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:08,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:08,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:08,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:09,585 INFO L124 PetriNetUnfolderBase]: 2452/4147 cut-off events. [2024-06-27 19:20:09,585 INFO L125 PetriNetUnfolderBase]: For 250589/250592 co-relation queries the response was YES. [2024-06-27 19:20:09,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27999 conditions, 4147 events. 2452/4147 cut-off events. For 250589/250592 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26649 event pairs, 468 based on Foata normal form. 3/4145 useless extension candidates. Maximal degree in co-relation 27854. Up to 3595 conditions per place. [2024-06-27 19:20:09,628 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 331 selfloop transitions, 107 changer transitions 0/445 dead transitions. [2024-06-27 19:20:09,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 445 transitions, 6994 flow [2024-06-27 19:20:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:20:09,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:20:09,629 INFO L175 Difference]: Start difference. First operand has 326 places, 421 transitions, 6058 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:20:09,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 445 transitions, 6994 flow [2024-06-27 19:20:10,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 445 transitions, 6492 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:10,595 INFO L231 Difference]: Finished difference. Result has 326 places, 421 transitions, 5780 flow [2024-06-27 19:20:10,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=326, PETRI_TRANSITIONS=421} [2024-06-27 19:20:10,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-27 19:20:10,596 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 421 transitions, 5780 flow [2024-06-27 19:20:10,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:10,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:10,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:10,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:20:10,596 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:10,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1626600650, now seen corresponding path program 19 times [2024-06-27 19:20:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:10,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142358783] [2024-06-27 19:20:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:10,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:10,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142358783] [2024-06-27 19:20:10,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142358783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:10,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961802754] [2024-06-27 19:20:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:10,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:10,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 421 transitions, 5780 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:10,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:10,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:10,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:11,435 INFO L124 PetriNetUnfolderBase]: 2449/4140 cut-off events. [2024-06-27 19:20:11,435 INFO L125 PetriNetUnfolderBase]: For 246444/246444 co-relation queries the response was YES. [2024-06-27 19:20:11,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27486 conditions, 4140 events. 2449/4140 cut-off events. For 246444/246444 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26631 event pairs, 480 based on Foata normal form. 1/4132 useless extension candidates. Maximal degree in co-relation 27341. Up to 3269 conditions per place. [2024-06-27 19:20:11,481 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 207 selfloop transitions, 244 changer transitions 0/458 dead transitions. [2024-06-27 19:20:11,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 458 transitions, 7225 flow [2024-06-27 19:20:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:20:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:20:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-27 19:20:11,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886363636363636 [2024-06-27 19:20:11,482 INFO L175 Difference]: Start difference. First operand has 326 places, 421 transitions, 5780 flow. Second operand 11 states and 259 transitions. [2024-06-27 19:20:11,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 458 transitions, 7225 flow [2024-06-27 19:20:12,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 458 transitions, 6989 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:12,442 INFO L231 Difference]: Finished difference. Result has 329 places, 422 transitions, 6065 flow [2024-06-27 19:20:12,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6065, PETRI_PLACES=329, PETRI_TRANSITIONS=422} [2024-06-27 19:20:12,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 19:20:12,443 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 422 transitions, 6065 flow [2024-06-27 19:20:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:20:12,444 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:12,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1622887160, now seen corresponding path program 20 times [2024-06-27 19:20:12,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:12,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242977684] [2024-06-27 19:20:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:12,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:12,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242977684] [2024-06-27 19:20:12,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242977684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:12,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:12,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:12,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363346553] [2024-06-27 19:20:12,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:12,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:12,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:12,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:12,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 422 transitions, 6065 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:12,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:12,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:12,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:13,348 INFO L124 PetriNetUnfolderBase]: 2446/4139 cut-off events. [2024-06-27 19:20:13,348 INFO L125 PetriNetUnfolderBase]: For 244829/244832 co-relation queries the response was YES. [2024-06-27 19:20:13,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 4139 events. 2446/4139 cut-off events. For 244829/244832 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26621 event pairs, 468 based on Foata normal form. 3/4137 useless extension candidates. Maximal degree in co-relation 27664. Up to 3559 conditions per place. [2024-06-27 19:20:13,396 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 308 selfloop transitions, 136 changer transitions 0/451 dead transitions. [2024-06-27 19:20:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 451 transitions, 7169 flow [2024-06-27 19:20:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:20:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:20:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-27 19:20:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-27 19:20:13,398 INFO L175 Difference]: Start difference. First operand has 329 places, 422 transitions, 6065 flow. Second operand 12 states and 265 transitions. [2024-06-27 19:20:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 451 transitions, 7169 flow [2024-06-27 19:20:14,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 451 transitions, 6733 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:20:14,432 INFO L231 Difference]: Finished difference. Result has 332 places, 422 transitions, 5917 flow [2024-06-27 19:20:14,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5917, PETRI_PLACES=332, PETRI_TRANSITIONS=422} [2024-06-27 19:20:14,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-27 19:20:14,433 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 422 transitions, 5917 flow [2024-06-27 19:20:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:14,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:14,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:14,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:20:14,434 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:14,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1622881580, now seen corresponding path program 21 times [2024-06-27 19:20:14,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:14,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566223981] [2024-06-27 19:20:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:14,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:14,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566223981] [2024-06-27 19:20:14,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566223981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:14,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267548142] [2024-06-27 19:20:14,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:14,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:14,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:14,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 422 transitions, 5917 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:14,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:14,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:14,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:15,502 INFO L124 PetriNetUnfolderBase]: 2443/4135 cut-off events. [2024-06-27 19:20:15,502 INFO L125 PetriNetUnfolderBase]: For 241714/241717 co-relation queries the response was YES. [2024-06-27 19:20:15,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27409 conditions, 4135 events. 2443/4135 cut-off events. For 241714/241717 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26594 event pairs, 468 based on Foata normal form. 3/4133 useless extension candidates. Maximal degree in co-relation 27264. Up to 3556 conditions per place. [2024-06-27 19:20:15,554 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 136 changer transitions 0/448 dead transitions. [2024-06-27 19:20:15,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 448 transitions, 6863 flow [2024-06-27 19:20:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:15,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:20:15,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:20:15,556 INFO L175 Difference]: Start difference. First operand has 332 places, 422 transitions, 5917 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:20:15,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 448 transitions, 6863 flow [2024-06-27 19:20:16,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 448 transitions, 6541 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-27 19:20:16,563 INFO L231 Difference]: Finished difference. Result has 330 places, 422 transitions, 5881 flow [2024-06-27 19:20:16,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5881, PETRI_PLACES=330, PETRI_TRANSITIONS=422} [2024-06-27 19:20:16,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 19:20:16,564 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 422 transitions, 5881 flow [2024-06-27 19:20:16,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:16,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:16,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:16,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:20:16,564 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:16,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash 692844632, now seen corresponding path program 22 times [2024-06-27 19:20:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:16,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522224716] [2024-06-27 19:20:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:16,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:16,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522224716] [2024-06-27 19:20:16,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522224716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:16,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:16,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:16,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385681841] [2024-06-27 19:20:16,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:16,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:16,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:16,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:16,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:16,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:16,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 422 transitions, 5881 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:16,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:16,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:16,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:17,412 INFO L124 PetriNetUnfolderBase]: 2437/4133 cut-off events. [2024-06-27 19:20:17,413 INFO L125 PetriNetUnfolderBase]: For 234499/234514 co-relation queries the response was YES. [2024-06-27 19:20:17,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27111 conditions, 4133 events. 2437/4133 cut-off events. For 234499/234514 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26736 event pairs, 493 based on Foata normal form. 14/4141 useless extension candidates. Maximal degree in co-relation 26968. Up to 3342 conditions per place. [2024-06-27 19:20:17,461 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 154 changer transitions 0/449 dead transitions. [2024-06-27 19:20:17,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 449 transitions, 6977 flow [2024-06-27 19:20:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:20:17,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-27 19:20:17,464 INFO L175 Difference]: Start difference. First operand has 330 places, 422 transitions, 5881 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:20:17,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 449 transitions, 6977 flow [2024-06-27 19:20:18,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 6746 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:18,444 INFO L231 Difference]: Finished difference. Result has 330 places, 422 transitions, 5969 flow [2024-06-27 19:20:18,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5969, PETRI_PLACES=330, PETRI_TRANSITIONS=422} [2024-06-27 19:20:18,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 19:20:18,445 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 422 transitions, 5969 flow [2024-06-27 19:20:18,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:18,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:18,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:18,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:20:18,446 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:18,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1892054386, now seen corresponding path program 23 times [2024-06-27 19:20:18,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:18,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139091908] [2024-06-27 19:20:18,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:18,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:18,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139091908] [2024-06-27 19:20:18,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139091908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:18,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:18,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:18,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031975916] [2024-06-27 19:20:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:18,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:18,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 422 transitions, 5969 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:18,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:18,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:18,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:19,340 INFO L124 PetriNetUnfolderBase]: 2425/4111 cut-off events. [2024-06-27 19:20:19,340 INFO L125 PetriNetUnfolderBase]: For 234821/234824 co-relation queries the response was YES. [2024-06-27 19:20:19,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26959 conditions, 4111 events. 2425/4111 cut-off events. For 234821/234824 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26501 event pairs, 468 based on Foata normal form. 6/4112 useless extension candidates. Maximal degree in co-relation 26815. Up to 3332 conditions per place. [2024-06-27 19:20:19,388 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 201 changer transitions 0/462 dead transitions. [2024-06-27 19:20:19,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 462 transitions, 7271 flow [2024-06-27 19:20:19,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:19,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-27 19:20:19,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-27 19:20:19,389 INFO L175 Difference]: Start difference. First operand has 330 places, 422 transitions, 5969 flow. Second operand 10 states and 248 transitions. [2024-06-27 19:20:19,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 462 transitions, 7271 flow [2024-06-27 19:20:20,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 462 transitions, 7015 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:20,425 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 6159 flow [2024-06-27 19:20:20,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5717, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6159, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-27 19:20:20,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-27 19:20:20,426 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 6159 flow [2024-06-27 19:20:20,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:20,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:20,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:20:20,426 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:20,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 962549282, now seen corresponding path program 24 times [2024-06-27 19:20:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:20,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460388225] [2024-06-27 19:20:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:20,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:20,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460388225] [2024-06-27 19:20:20,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460388225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:20,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:20,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953469098] [2024-06-27 19:20:20,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:20,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:20,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 6159 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:20,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:20,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:20,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:21,267 INFO L124 PetriNetUnfolderBase]: 2413/4095 cut-off events. [2024-06-27 19:20:21,267 INFO L125 PetriNetUnfolderBase]: For 224743/224746 co-relation queries the response was YES. [2024-06-27 19:20:21,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 4095 events. 2413/4095 cut-off events. For 224743/224746 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26387 event pairs, 468 based on Foata normal form. 6/4096 useless extension candidates. Maximal degree in co-relation 26632. Up to 3322 conditions per place. [2024-06-27 19:20:21,314 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 199 changer transitions 0/461 dead transitions. [2024-06-27 19:20:21,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 461 transitions, 7311 flow [2024-06-27 19:20:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 19:20:21,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6225 [2024-06-27 19:20:21,315 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 6159 flow. Second operand 10 states and 249 transitions. [2024-06-27 19:20:21,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 461 transitions, 7311 flow [2024-06-27 19:20:22,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 461 transitions, 6838 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-27 19:20:22,350 INFO L231 Difference]: Finished difference. Result has 333 places, 422 transitions, 6122 flow [2024-06-27 19:20:22,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6122, PETRI_PLACES=333, PETRI_TRANSITIONS=422} [2024-06-27 19:20:22,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 19:20:22,351 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 422 transitions, 6122 flow [2024-06-27 19:20:22,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:22,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:22,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:22,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:20:22,351 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:22,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash -248619634, now seen corresponding path program 25 times [2024-06-27 19:20:22,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:22,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257932449] [2024-06-27 19:20:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:22,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:22,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:22,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257932449] [2024-06-27 19:20:22,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257932449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:22,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:22,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:22,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89561783] [2024-06-27 19:20:22,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:22,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:22,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:22,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:22,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 422 transitions, 6122 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:22,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:22,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:22,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:23,172 INFO L124 PetriNetUnfolderBase]: 2415/4093 cut-off events. [2024-06-27 19:20:23,173 INFO L125 PetriNetUnfolderBase]: For 206540/206543 co-relation queries the response was YES. [2024-06-27 19:20:23,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26579 conditions, 4093 events. 2415/4093 cut-off events. For 206540/206543 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26375 event pairs, 480 based on Foata normal form. 4/4085 useless extension candidates. Maximal degree in co-relation 26437. Up to 3235 conditions per place. [2024-06-27 19:20:23,216 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 212 selfloop transitions, 248 changer transitions 0/467 dead transitions. [2024-06-27 19:20:23,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 467 transitions, 7332 flow [2024-06-27 19:20:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-27 19:20:23,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-27 19:20:23,218 INFO L175 Difference]: Start difference. First operand has 333 places, 422 transitions, 6122 flow. Second operand 10 states and 252 transitions. [2024-06-27 19:20:23,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 467 transitions, 7332 flow [2024-06-27 19:20:24,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 467 transitions, 6773 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-27 19:20:24,180 INFO L231 Difference]: Finished difference. Result has 331 places, 425 transitions, 6190 flow [2024-06-27 19:20:24,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5571, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6190, PETRI_PLACES=331, PETRI_TRANSITIONS=425} [2024-06-27 19:20:24,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-27 19:20:24,180 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 425 transitions, 6190 flow [2024-06-27 19:20:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:24,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:24,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:24,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:20:24,181 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:24,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:24,182 INFO L85 PathProgramCache]: Analyzing trace with hash -887571202, now seen corresponding path program 2 times [2024-06-27 19:20:24,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:24,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532805845] [2024-06-27 19:20:24,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:24,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:24,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532805845] [2024-06-27 19:20:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532805845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:24,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061954439] [2024-06-27 19:20:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:24,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:24,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:24,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:24,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:24,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 425 transitions, 6190 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:24,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:24,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:24,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:24,957 INFO L124 PetriNetUnfolderBase]: 2435/4134 cut-off events. [2024-06-27 19:20:24,957 INFO L125 PetriNetUnfolderBase]: For 200411/200411 co-relation queries the response was YES. [2024-06-27 19:20:24,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26594 conditions, 4134 events. 2435/4134 cut-off events. For 200411/200411 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26677 event pairs, 363 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 26452. Up to 3605 conditions per place. [2024-06-27 19:20:25,001 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 405 selfloop transitions, 44 changer transitions 0/456 dead transitions. [2024-06-27 19:20:25,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 456 transitions, 7228 flow [2024-06-27 19:20:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:20:25,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:20:25,002 INFO L175 Difference]: Start difference. First operand has 331 places, 425 transitions, 6190 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:20:25,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 456 transitions, 7228 flow [2024-06-27 19:20:25,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 456 transitions, 6762 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 19:20:25,969 INFO L231 Difference]: Finished difference. Result has 329 places, 428 transitions, 5859 flow [2024-06-27 19:20:25,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5859, PETRI_PLACES=329, PETRI_TRANSITIONS=428} [2024-06-27 19:20:25,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-27 19:20:25,969 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 428 transitions, 5859 flow [2024-06-27 19:20:25,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:25,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:25,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:25,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:20:25,970 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:25,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:25,971 INFO L85 PathProgramCache]: Analyzing trace with hash 135857060, now seen corresponding path program 3 times [2024-06-27 19:20:25,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:25,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23625159] [2024-06-27 19:20:25,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:25,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:26,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:26,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23625159] [2024-06-27 19:20:26,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23625159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:26,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:26,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:20:26,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755110184] [2024-06-27 19:20:26,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:26,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:20:26,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:20:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:20:26,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:26,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 428 transitions, 5859 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:26,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:26,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:26,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:26,718 INFO L124 PetriNetUnfolderBase]: 2422/4117 cut-off events. [2024-06-27 19:20:26,719 INFO L125 PetriNetUnfolderBase]: For 172595/172601 co-relation queries the response was YES. [2024-06-27 19:20:26,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25541 conditions, 4117 events. 2422/4117 cut-off events. For 172595/172601 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 26559 event pairs, 391 based on Foata normal form. 8/4120 useless extension candidates. Maximal degree in co-relation 25398. Up to 3350 conditions per place. [2024-06-27 19:20:26,763 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 402 selfloop transitions, 44 changer transitions 0/453 dead transitions. [2024-06-27 19:20:26,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 453 transitions, 6869 flow [2024-06-27 19:20:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:26,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 19:20:26,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 19:20:26,764 INFO L175 Difference]: Start difference. First operand has 329 places, 428 transitions, 5859 flow. Second operand 6 states and 142 transitions. [2024-06-27 19:20:26,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 453 transitions, 6869 flow [2024-06-27 19:20:27,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 453 transitions, 6819 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:27,499 INFO L231 Difference]: Finished difference. Result has 334 places, 430 transitions, 5922 flow [2024-06-27 19:20:27,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5922, PETRI_PLACES=334, PETRI_TRANSITIONS=430} [2024-06-27 19:20:27,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-27 19:20:27,500 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 430 transitions, 5922 flow [2024-06-27 19:20:27,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:27,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:27,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:20:27,501 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:27,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1658644938, now seen corresponding path program 1 times [2024-06-27 19:20:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:27,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825751172] [2024-06-27 19:20:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825751172] [2024-06-27 19:20:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825751172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:27,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:27,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075963005] [2024-06-27 19:20:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:27,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:27,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:27,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:27,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:27,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:27,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 430 transitions, 5922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:27,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:27,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:27,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:28,365 INFO L124 PetriNetUnfolderBase]: 2581/4394 cut-off events. [2024-06-27 19:20:28,365 INFO L125 PetriNetUnfolderBase]: For 236085/236100 co-relation queries the response was YES. [2024-06-27 19:20:28,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28661 conditions, 4394 events. 2581/4394 cut-off events. For 236085/236100 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 28763 event pairs, 450 based on Foata normal form. 24/4412 useless extension candidates. Maximal degree in co-relation 28515. Up to 3347 conditions per place. [2024-06-27 19:20:28,415 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 374 selfloop transitions, 85 changer transitions 0/466 dead transitions. [2024-06-27 19:20:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 466 transitions, 7348 flow [2024-06-27 19:20:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:28,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:20:28,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:20:28,416 INFO L175 Difference]: Start difference. First operand has 334 places, 430 transitions, 5922 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:20:28,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 466 transitions, 7348 flow [2024-06-27 19:20:29,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 466 transitions, 7193 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:29,135 INFO L231 Difference]: Finished difference. Result has 337 places, 435 transitions, 6056 flow [2024-06-27 19:20:29,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5767, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6056, PETRI_PLACES=337, PETRI_TRANSITIONS=435} [2024-06-27 19:20:29,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 19:20:29,136 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 435 transitions, 6056 flow [2024-06-27 19:20:29,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:29,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:29,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:20:29,136 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:29,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:29,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1497907884, now seen corresponding path program 2 times [2024-06-27 19:20:29,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:29,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961761864] [2024-06-27 19:20:29,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:29,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961761864] [2024-06-27 19:20:29,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961761864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:29,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:29,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:29,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990918381] [2024-06-27 19:20:29,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:29,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:29,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 435 transitions, 6056 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:29,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:29,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:29,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:30,001 INFO L124 PetriNetUnfolderBase]: 2733/4628 cut-off events. [2024-06-27 19:20:30,001 INFO L125 PetriNetUnfolderBase]: For 287220/287235 co-relation queries the response was YES. [2024-06-27 19:20:30,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31424 conditions, 4628 events. 2733/4628 cut-off events. For 287220/287235 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 30420 event pairs, 574 based on Foata normal form. 24/4646 useless extension candidates. Maximal degree in co-relation 31278. Up to 3810 conditions per place. [2024-06-27 19:20:30,052 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 376 selfloop transitions, 79 changer transitions 0/462 dead transitions. [2024-06-27 19:20:30,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 462 transitions, 7288 flow [2024-06-27 19:20:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:30,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 19:20:30,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-27 19:20:30,053 INFO L175 Difference]: Start difference. First operand has 337 places, 435 transitions, 6056 flow. Second operand 7 states and 166 transitions. [2024-06-27 19:20:30,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 462 transitions, 7288 flow [2024-06-27 19:20:30,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 462 transitions, 7168 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-27 19:20:30,977 INFO L231 Difference]: Finished difference. Result has 343 places, 439 transitions, 6204 flow [2024-06-27 19:20:30,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6204, PETRI_PLACES=343, PETRI_TRANSITIONS=439} [2024-06-27 19:20:30,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-27 19:20:30,978 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 439 transitions, 6204 flow [2024-06-27 19:20:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:30,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:30,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:20:30,978 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:30,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1498055754, now seen corresponding path program 3 times [2024-06-27 19:20:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006128880] [2024-06-27 19:20:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:31,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:31,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006128880] [2024-06-27 19:20:31,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006128880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:31,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:31,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979175515] [2024-06-27 19:20:31,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:31,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:31,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:31,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:31,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 439 transitions, 6204 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:31,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:31,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:31,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:31,853 INFO L124 PetriNetUnfolderBase]: 2743/4646 cut-off events. [2024-06-27 19:20:31,853 INFO L125 PetriNetUnfolderBase]: For 288240/288255 co-relation queries the response was YES. [2024-06-27 19:20:31,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31318 conditions, 4646 events. 2743/4646 cut-off events. For 288240/288255 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 30578 event pairs, 585 based on Foata normal form. 28/4668 useless extension candidates. Maximal degree in co-relation 31169. Up to 3986 conditions per place. [2024-06-27 19:20:31,904 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 82 changer transitions 0/459 dead transitions. [2024-06-27 19:20:31,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 459 transitions, 7219 flow [2024-06-27 19:20:31,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:20:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:20:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:20:31,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:20:31,905 INFO L175 Difference]: Start difference. First operand has 343 places, 439 transitions, 6204 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:20:31,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 459 transitions, 7219 flow [2024-06-27 19:20:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 459 transitions, 7091 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:20:32,734 INFO L231 Difference]: Finished difference. Result has 347 places, 441 transitions, 6297 flow [2024-06-27 19:20:32,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6078, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6297, PETRI_PLACES=347, PETRI_TRANSITIONS=441} [2024-06-27 19:20:32,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 19:20:32,734 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 441 transitions, 6297 flow [2024-06-27 19:20:32,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:32,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:32,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:20:32,735 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:32,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:32,735 INFO L85 PathProgramCache]: Analyzing trace with hash 698632022, now seen corresponding path program 4 times [2024-06-27 19:20:32,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:32,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199988753] [2024-06-27 19:20:32,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:32,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:32,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199988753] [2024-06-27 19:20:32,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199988753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:32,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:32,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:32,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483695202] [2024-06-27 19:20:32,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:32,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:32,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:32,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:32,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:32,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 441 transitions, 6297 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:32,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:32,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:32,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:33,674 INFO L124 PetriNetUnfolderBase]: 2799/4734 cut-off events. [2024-06-27 19:20:33,675 INFO L125 PetriNetUnfolderBase]: For 296436/296451 co-relation queries the response was YES. [2024-06-27 19:20:33,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32075 conditions, 4734 events. 2799/4734 cut-off events. For 296436/296451 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 31229 event pairs, 591 based on Foata normal form. 28/4756 useless extension candidates. Maximal degree in co-relation 31924. Up to 4104 conditions per place. [2024-06-27 19:20:33,727 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 372 selfloop transitions, 83 changer transitions 0/462 dead transitions. [2024-06-27 19:20:33,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 462 transitions, 7321 flow [2024-06-27 19:20:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:20:33,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:20:33,728 INFO L175 Difference]: Start difference. First operand has 347 places, 441 transitions, 6297 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:20:33,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 462 transitions, 7321 flow [2024-06-27 19:20:34,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 462 transitions, 7135 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:34,651 INFO L231 Difference]: Finished difference. Result has 350 places, 443 transitions, 6335 flow [2024-06-27 19:20:34,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6335, PETRI_PLACES=350, PETRI_TRANSITIONS=443} [2024-06-27 19:20:34,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 19:20:34,651 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 443 transitions, 6335 flow [2024-06-27 19:20:34,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:34,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:34,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:20:34,652 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:34,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash 693269642, now seen corresponding path program 5 times [2024-06-27 19:20:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:34,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19972394] [2024-06-27 19:20:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:34,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:34,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:34,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19972394] [2024-06-27 19:20:34,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19972394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:34,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:34,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:34,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810675573] [2024-06-27 19:20:34,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:34,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:34,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:34,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:34,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:34,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:34,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 443 transitions, 6335 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:34,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:34,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:34,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:35,639 INFO L124 PetriNetUnfolderBase]: 2842/4811 cut-off events. [2024-06-27 19:20:35,639 INFO L125 PetriNetUnfolderBase]: For 300624/300639 co-relation queries the response was YES. [2024-06-27 19:20:35,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32438 conditions, 4811 events. 2842/4811 cut-off events. For 300624/300639 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31820 event pairs, 606 based on Foata normal form. 28/4833 useless extension candidates. Maximal degree in co-relation 32286. Up to 4173 conditions per place. [2024-06-27 19:20:35,690 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 384 selfloop transitions, 71 changer transitions 0/462 dead transitions. [2024-06-27 19:20:35,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 462 transitions, 7359 flow [2024-06-27 19:20:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 19:20:35,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-27 19:20:35,691 INFO L175 Difference]: Start difference. First operand has 350 places, 443 transitions, 6335 flow. Second operand 6 states and 143 transitions. [2024-06-27 19:20:35,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 462 transitions, 7359 flow [2024-06-27 19:20:36,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 462 transitions, 7165 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:36,710 INFO L231 Difference]: Finished difference. Result has 350 places, 445 transitions, 6345 flow [2024-06-27 19:20:36,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6345, PETRI_PLACES=350, PETRI_TRANSITIONS=445} [2024-06-27 19:20:36,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 19:20:36,711 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 445 transitions, 6345 flow [2024-06-27 19:20:36,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:36,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:36,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:20:36,711 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:36,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:36,711 INFO L85 PathProgramCache]: Analyzing trace with hash 693121772, now seen corresponding path program 6 times [2024-06-27 19:20:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:36,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998292724] [2024-06-27 19:20:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:36,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:36,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:36,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998292724] [2024-06-27 19:20:36,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998292724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:36,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:36,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:36,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488833002] [2024-06-27 19:20:36,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:36,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:36,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:36,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:36,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:36,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 445 transitions, 6345 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:36,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:36,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:36,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:37,650 INFO L124 PetriNetUnfolderBase]: 2856/4847 cut-off events. [2024-06-27 19:20:37,650 INFO L125 PetriNetUnfolderBase]: For 280418/280433 co-relation queries the response was YES. [2024-06-27 19:20:37,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32169 conditions, 4847 events. 2856/4847 cut-off events. For 280418/280433 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32142 event pairs, 510 based on Foata normal form. 24/4865 useless extension candidates. Maximal degree in co-relation 32016. Up to 3852 conditions per place. [2024-06-27 19:20:37,702 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 77 changer transitions 0/472 dead transitions. [2024-06-27 19:20:37,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 472 transitions, 7585 flow [2024-06-27 19:20:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:20:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:20:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:20:37,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:20:37,703 INFO L175 Difference]: Start difference. First operand has 350 places, 445 transitions, 6345 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:20:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 472 transitions, 7585 flow [2024-06-27 19:20:38,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 472 transitions, 7411 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:20:38,603 INFO L231 Difference]: Finished difference. Result has 353 places, 448 transitions, 6448 flow [2024-06-27 19:20:38,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6448, PETRI_PLACES=353, PETRI_TRANSITIONS=448} [2024-06-27 19:20:38,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-27 19:20:38,603 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 448 transitions, 6448 flow [2024-06-27 19:20:38,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:38,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:38,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:20:38,604 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:38,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:38,604 INFO L85 PathProgramCache]: Analyzing trace with hash 698847224, now seen corresponding path program 1 times [2024-06-27 19:20:38,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:38,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022151647] [2024-06-27 19:20:38,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:38,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:38,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:38,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022151647] [2024-06-27 19:20:38,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022151647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:38,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:38,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997875811] [2024-06-27 19:20:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:38,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:38,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:38,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 448 transitions, 6448 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:38,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:38,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:39,546 INFO L124 PetriNetUnfolderBase]: 2863/4854 cut-off events. [2024-06-27 19:20:39,547 INFO L125 PetriNetUnfolderBase]: For 274841/274856 co-relation queries the response was YES. [2024-06-27 19:20:39,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 4854 events. 2863/4854 cut-off events. For 274841/274856 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32146 event pairs, 571 based on Foata normal form. 24/4872 useless extension candidates. Maximal degree in co-relation 31764. Up to 4068 conditions per place. [2024-06-27 19:20:39,598 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 372 selfloop transitions, 92 changer transitions 0/471 dead transitions. [2024-06-27 19:20:39,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 471 transitions, 7480 flow [2024-06-27 19:20:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:20:39,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:20:39,599 INFO L175 Difference]: Start difference. First operand has 353 places, 448 transitions, 6448 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:20:39,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 471 transitions, 7480 flow [2024-06-27 19:20:40,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 471 transitions, 7212 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:40,920 INFO L231 Difference]: Finished difference. Result has 356 places, 449 transitions, 6391 flow [2024-06-27 19:20:40,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6391, PETRI_PLACES=356, PETRI_TRANSITIONS=449} [2024-06-27 19:20:40,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-27 19:20:40,921 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 449 transitions, 6391 flow [2024-06-27 19:20:40,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:40,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:40,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:40,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:20:40,922 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:40,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:40,922 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-27 19:20:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:40,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172846621] [2024-06-27 19:20:40,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:41,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172846621] [2024-06-27 19:20:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172846621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:41,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870501634] [2024-06-27 19:20:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:41,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:41,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 449 transitions, 6391 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:41,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:41,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:41,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:41,875 INFO L124 PetriNetUnfolderBase]: 2860/4851 cut-off events. [2024-06-27 19:20:41,875 INFO L125 PetriNetUnfolderBase]: For 246152/246164 co-relation queries the response was YES. [2024-06-27 19:20:41,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31315 conditions, 4851 events. 2860/4851 cut-off events. For 246152/246164 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 32156 event pairs, 640 based on Foata normal form. 11/4854 useless extension candidates. Maximal degree in co-relation 31160. Up to 3855 conditions per place. [2024-06-27 19:20:41,927 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 211 changer transitions 0/475 dead transitions. [2024-06-27 19:20:41,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 475 transitions, 7683 flow [2024-06-27 19:20:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:20:41,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:20:41,928 INFO L175 Difference]: Start difference. First operand has 356 places, 449 transitions, 6391 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:20:41,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 475 transitions, 7683 flow [2024-06-27 19:20:43,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 475 transitions, 7413 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:43,034 INFO L231 Difference]: Finished difference. Result has 357 places, 449 transitions, 6549 flow [2024-06-27 19:20:43,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6549, PETRI_PLACES=357, PETRI_TRANSITIONS=449} [2024-06-27 19:20:43,035 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-27 19:20:43,035 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 449 transitions, 6549 flow [2024-06-27 19:20:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:43,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:43,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:20:43,036 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:43,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 644887198, now seen corresponding path program 2 times [2024-06-27 19:20:43,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:43,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915915110] [2024-06-27 19:20:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:43,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:43,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:43,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915915110] [2024-06-27 19:20:43,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915915110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:43,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:43,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:43,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511189951] [2024-06-27 19:20:43,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:43,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:43,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:43,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:43,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:43,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:43,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 449 transitions, 6549 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:43,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:43,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:43,966 INFO L124 PetriNetUnfolderBase]: 2873/4874 cut-off events. [2024-06-27 19:20:43,966 INFO L125 PetriNetUnfolderBase]: For 254461/254476 co-relation queries the response was YES. [2024-06-27 19:20:44,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31474 conditions, 4874 events. 2873/4874 cut-off events. For 254461/254476 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32389 event pairs, 604 based on Foata normal form. 13/4881 useless extension candidates. Maximal degree in co-relation 31319. Up to 4224 conditions per place. [2024-06-27 19:20:44,019 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 357 selfloop transitions, 115 changer transitions 0/479 dead transitions. [2024-06-27 19:20:44,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 479 transitions, 7787 flow [2024-06-27 19:20:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 19:20:44,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:20:44,020 INFO L175 Difference]: Start difference. First operand has 357 places, 449 transitions, 6549 flow. Second operand 10 states and 220 transitions. [2024-06-27 19:20:44,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 479 transitions, 7787 flow [2024-06-27 19:20:45,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 479 transitions, 7043 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:45,087 INFO L231 Difference]: Finished difference. Result has 359 places, 455 transitions, 6137 flow [2024-06-27 19:20:45,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5853, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6137, PETRI_PLACES=359, PETRI_TRANSITIONS=455} [2024-06-27 19:20:45,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 19:20:45,087 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 455 transitions, 6137 flow [2024-06-27 19:20:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:20:45,088 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:45,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:45,088 INFO L85 PathProgramCache]: Analyzing trace with hash 644881618, now seen corresponding path program 3 times [2024-06-27 19:20:45,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:45,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388914686] [2024-06-27 19:20:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388914686] [2024-06-27 19:20:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388914686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842359202] [2024-06-27 19:20:45,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:45,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:45,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:45,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 455 transitions, 6137 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:45,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:45,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:45,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:46,012 INFO L124 PetriNetUnfolderBase]: 2870/4870 cut-off events. [2024-06-27 19:20:46,012 INFO L125 PetriNetUnfolderBase]: For 248172/248187 co-relation queries the response was YES. [2024-06-27 19:20:46,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30693 conditions, 4870 events. 2870/4870 cut-off events. For 248172/248187 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32312 event pairs, 614 based on Foata normal form. 13/4877 useless extension candidates. Maximal degree in co-relation 30540. Up to 4221 conditions per place. [2024-06-27 19:20:46,063 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 355 selfloop transitions, 114 changer transitions 0/476 dead transitions. [2024-06-27 19:20:46,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 476 transitions, 7127 flow [2024-06-27 19:20:46,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:20:46,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:20:46,064 INFO L175 Difference]: Start difference. First operand has 359 places, 455 transitions, 6137 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:20:46,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 476 transitions, 7127 flow [2024-06-27 19:20:47,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 476 transitions, 6984 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:47,149 INFO L231 Difference]: Finished difference. Result has 361 places, 455 transitions, 6228 flow [2024-06-27 19:20:47,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6228, PETRI_PLACES=361, PETRI_TRANSITIONS=455} [2024-06-27 19:20:47,150 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-27 19:20:47,150 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 455 transitions, 6228 flow [2024-06-27 19:20:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:47,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:47,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:20:47,150 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:47,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1840997022, now seen corresponding path program 4 times [2024-06-27 19:20:47,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610952077] [2024-06-27 19:20:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:47,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:47,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:47,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610952077] [2024-06-27 19:20:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610952077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:47,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:47,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:47,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455328935] [2024-06-27 19:20:47,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:47,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:47,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:47,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:47,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 455 transitions, 6228 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:47,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:47,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:47,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:48,082 INFO L124 PetriNetUnfolderBase]: 2899/4918 cut-off events. [2024-06-27 19:20:48,082 INFO L125 PetriNetUnfolderBase]: For 263611/263626 co-relation queries the response was YES. [2024-06-27 19:20:48,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31404 conditions, 4918 events. 2899/4918 cut-off events. For 263611/263626 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32721 event pairs, 604 based on Foata normal form. 13/4925 useless extension candidates. Maximal degree in co-relation 31249. Up to 4233 conditions per place. [2024-06-27 19:20:48,135 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 131 changer transitions 0/491 dead transitions. [2024-06-27 19:20:48,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 491 transitions, 7809 flow [2024-06-27 19:20:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:20:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:20:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-27 19:20:48,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-27 19:20:48,136 INFO L175 Difference]: Start difference. First operand has 361 places, 455 transitions, 6228 flow. Second operand 11 states and 240 transitions. [2024-06-27 19:20:48,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 491 transitions, 7809 flow [2024-06-27 19:20:49,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 491 transitions, 7581 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:20:49,148 INFO L231 Difference]: Finished difference. Result has 366 places, 467 transitions, 6407 flow [2024-06-27 19:20:49,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6000, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6407, PETRI_PLACES=366, PETRI_TRANSITIONS=467} [2024-06-27 19:20:49,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-27 19:20:49,149 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 467 transitions, 6407 flow [2024-06-27 19:20:49,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:49,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:20:49,149 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:49,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:49,150 INFO L85 PathProgramCache]: Analyzing trace with hash 788772148, now seen corresponding path program 5 times [2024-06-27 19:20:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126248718] [2024-06-27 19:20:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:49,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:49,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126248718] [2024-06-27 19:20:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126248718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:49,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566606029] [2024-06-27 19:20:49,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:49,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:49,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 467 transitions, 6407 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:49,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:49,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:49,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:50,235 INFO L124 PetriNetUnfolderBase]: 2896/4914 cut-off events. [2024-06-27 19:20:50,236 INFO L125 PetriNetUnfolderBase]: For 267269/267284 co-relation queries the response was YES. [2024-06-27 19:20:50,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31487 conditions, 4914 events. 2896/4914 cut-off events. For 267269/267284 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32670 event pairs, 604 based on Foata normal form. 13/4921 useless extension candidates. Maximal degree in co-relation 31330. Up to 4230 conditions per place. [2024-06-27 19:20:50,280 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 351 selfloop transitions, 130 changer transitions 0/488 dead transitions. [2024-06-27 19:20:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 488 transitions, 7723 flow [2024-06-27 19:20:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:20:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:20:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-27 19:20:50,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-27 19:20:50,281 INFO L175 Difference]: Start difference. First operand has 366 places, 467 transitions, 6407 flow. Second operand 9 states and 203 transitions. [2024-06-27 19:20:50,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 488 transitions, 7723 flow [2024-06-27 19:20:51,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 488 transitions, 7469 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:20:51,235 INFO L231 Difference]: Finished difference. Result has 369 places, 467 transitions, 6419 flow [2024-06-27 19:20:51,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6153, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6419, PETRI_PLACES=369, PETRI_TRANSITIONS=467} [2024-06-27 19:20:51,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-27 19:20:51,236 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 467 transitions, 6419 flow [2024-06-27 19:20:51,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:51,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:51,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:20:51,236 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:51,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1848348672, now seen corresponding path program 6 times [2024-06-27 19:20:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:51,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053721906] [2024-06-27 19:20:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:51,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:51,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:51,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053721906] [2024-06-27 19:20:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053721906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:51,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:51,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732957764] [2024-06-27 19:20:51,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:51,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:51,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:51,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:51,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:51,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:51,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 467 transitions, 6419 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:51,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:51,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:51,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:52,186 INFO L124 PetriNetUnfolderBase]: 2893/4910 cut-off events. [2024-06-27 19:20:52,186 INFO L125 PetriNetUnfolderBase]: For 269621/269636 co-relation queries the response was YES. [2024-06-27 19:20:52,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31478 conditions, 4910 events. 2893/4910 cut-off events. For 269621/269636 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32626 event pairs, 614 based on Foata normal form. 13/4917 useless extension candidates. Maximal degree in co-relation 31320. Up to 4227 conditions per place. [2024-06-27 19:20:52,242 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 344 selfloop transitions, 137 changer transitions 0/488 dead transitions. [2024-06-27 19:20:52,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 488 transitions, 7585 flow [2024-06-27 19:20:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:20:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:20:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-27 19:20:52,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-27 19:20:52,243 INFO L175 Difference]: Start difference. First operand has 369 places, 467 transitions, 6419 flow. Second operand 10 states and 217 transitions. [2024-06-27 19:20:52,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 488 transitions, 7585 flow [2024-06-27 19:20:53,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 488 transitions, 7323 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:53,310 INFO L231 Difference]: Finished difference. Result has 371 places, 467 transitions, 6437 flow [2024-06-27 19:20:53,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6157, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6437, PETRI_PLACES=371, PETRI_TRANSITIONS=467} [2024-06-27 19:20:53,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-27 19:20:53,310 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 467 transitions, 6437 flow [2024-06-27 19:20:53,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:53,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:20:53,311 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:53,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash 211256563, now seen corresponding path program 1 times [2024-06-27 19:20:53,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:53,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376315897] [2024-06-27 19:20:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:53,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376315897] [2024-06-27 19:20:53,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376315897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:53,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:53,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643164838] [2024-06-27 19:20:53,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:53,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:53,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:53,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:53,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 467 transitions, 6437 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:53,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:53,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:53,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:54,263 INFO L124 PetriNetUnfolderBase]: 2973/5008 cut-off events. [2024-06-27 19:20:54,263 INFO L125 PetriNetUnfolderBase]: For 316860/316860 co-relation queries the response was YES. [2024-06-27 19:20:54,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33445 conditions, 5008 events. 2973/5008 cut-off events. For 316860/316860 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33146 event pairs, 602 based on Foata normal form. 2/4993 useless extension candidates. Maximal degree in co-relation 33286. Up to 4310 conditions per place. [2024-06-27 19:20:54,319 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 395 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-27 19:20:54,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 506 transitions, 7826 flow [2024-06-27 19:20:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:20:54,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-27 19:20:54,320 INFO L175 Difference]: Start difference. First operand has 371 places, 467 transitions, 6437 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:20:54,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 506 transitions, 7826 flow [2024-06-27 19:20:55,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 506 transitions, 7570 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:20:55,457 INFO L231 Difference]: Finished difference. Result has 372 places, 473 transitions, 6551 flow [2024-06-27 19:20:55,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6181, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6551, PETRI_PLACES=372, PETRI_TRANSITIONS=473} [2024-06-27 19:20:55,457 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-27 19:20:55,457 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 473 transitions, 6551 flow [2024-06-27 19:20:55,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:55,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:20:55,458 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash 153418609, now seen corresponding path program 2 times [2024-06-27 19:20:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443776304] [2024-06-27 19:20:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:55,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:55,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443776304] [2024-06-27 19:20:55,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443776304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:55,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:55,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:55,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352128119] [2024-06-27 19:20:55,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:55,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:55,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:55,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:55,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:55,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:55,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 473 transitions, 6551 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:55,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:55,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:56,406 INFO L124 PetriNetUnfolderBase]: 2968/5012 cut-off events. [2024-06-27 19:20:56,406 INFO L125 PetriNetUnfolderBase]: For 319545/319545 co-relation queries the response was YES. [2024-06-27 19:20:56,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33515 conditions, 5012 events. 2968/5012 cut-off events. For 319545/319545 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 33248 event pairs, 602 based on Foata normal form. 2/5003 useless extension candidates. Maximal degree in co-relation 33354. Up to 4395 conditions per place. [2024-06-27 19:20:56,464 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 392 selfloop transitions, 99 changer transitions 0/498 dead transitions. [2024-06-27 19:20:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 498 transitions, 7595 flow [2024-06-27 19:20:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-27 19:20:56,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-27 19:20:56,465 INFO L175 Difference]: Start difference. First operand has 372 places, 473 transitions, 6551 flow. Second operand 8 states and 190 transitions. [2024-06-27 19:20:56,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 498 transitions, 7595 flow [2024-06-27 19:20:57,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 498 transitions, 7370 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:20:57,839 INFO L231 Difference]: Finished difference. Result has 375 places, 473 transitions, 6529 flow [2024-06-27 19:20:57,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6326, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6529, PETRI_PLACES=375, PETRI_TRANSITIONS=473} [2024-06-27 19:20:57,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-27 19:20:57,839 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 473 transitions, 6529 flow [2024-06-27 19:20:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:57,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:20:57,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:20:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:20:57,840 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:20:57,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:20:57,840 INFO L85 PathProgramCache]: Analyzing trace with hash 268709779, now seen corresponding path program 3 times [2024-06-27 19:20:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:20:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213420993] [2024-06-27 19:20:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:20:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:20:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:20:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:20:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:20:57,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213420993] [2024-06-27 19:20:57,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213420993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:20:57,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:20:57,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:20:57,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877567783] [2024-06-27 19:20:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:20:57,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:20:57,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:20:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:20:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:20:57,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:20:57,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 473 transitions, 6529 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:20:57,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:20:57,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:20:57,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:20:58,823 INFO L124 PetriNetUnfolderBase]: 2976/5027 cut-off events. [2024-06-27 19:20:58,823 INFO L125 PetriNetUnfolderBase]: For 326699/326702 co-relation queries the response was YES. [2024-06-27 19:20:58,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33636 conditions, 5027 events. 2976/5027 cut-off events. For 326699/326702 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33334 event pairs, 592 based on Foata normal form. 4/5024 useless extension candidates. Maximal degree in co-relation 33474. Up to 4524 conditions per place. [2024-06-27 19:20:58,879 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 440 selfloop transitions, 50 changer transitions 0/497 dead transitions. [2024-06-27 19:20:58,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 497 transitions, 7614 flow [2024-06-27 19:20:58,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:20:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:20:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:20:58,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:20:58,880 INFO L175 Difference]: Start difference. First operand has 375 places, 473 transitions, 6529 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:20:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 497 transitions, 7614 flow [2024-06-27 19:21:00,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 497 transitions, 7387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:00,203 INFO L231 Difference]: Finished difference. Result has 377 places, 475 transitions, 6462 flow [2024-06-27 19:21:00,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6462, PETRI_PLACES=377, PETRI_TRANSITIONS=475} [2024-06-27 19:21:00,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 19:21:00,204 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 475 transitions, 6462 flow [2024-06-27 19:21:00,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:00,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:00,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:21:00,204 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:00,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:00,204 INFO L85 PathProgramCache]: Analyzing trace with hash -22076204, now seen corresponding path program 7 times [2024-06-27 19:21:00,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848986638] [2024-06-27 19:21:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:00,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:00,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:00,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848986638] [2024-06-27 19:21:00,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848986638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:00,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:00,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794557542] [2024-06-27 19:21:00,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:00,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:00,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:00,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 475 transitions, 6462 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:00,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:00,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:00,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:01,159 INFO L124 PetriNetUnfolderBase]: 2989/5056 cut-off events. [2024-06-27 19:21:01,160 INFO L125 PetriNetUnfolderBase]: For 335463/335475 co-relation queries the response was YES. [2024-06-27 19:21:01,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33726 conditions, 5056 events. 2989/5056 cut-off events. For 335463/335475 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 33641 event pairs, 657 based on Foata normal form. 11/5059 useless extension candidates. Maximal degree in co-relation 33563. Up to 4135 conditions per place. [2024-06-27 19:21:01,217 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 310 selfloop transitions, 186 changer transitions 0/503 dead transitions. [2024-06-27 19:21:01,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 503 transitions, 7884 flow [2024-06-27 19:21:01,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:21:01,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-27 19:21:01,218 INFO L175 Difference]: Start difference. First operand has 377 places, 475 transitions, 6462 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:21:01,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 503 transitions, 7884 flow [2024-06-27 19:21:02,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 503 transitions, 7751 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:02,629 INFO L231 Difference]: Finished difference. Result has 378 places, 481 transitions, 6760 flow [2024-06-27 19:21:02,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=378, PETRI_TRANSITIONS=481} [2024-06-27 19:21:02,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-27 19:21:02,630 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 481 transitions, 6760 flow [2024-06-27 19:21:02,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:02,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:02,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:02,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:21:02,630 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:02,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash 204852490, now seen corresponding path program 8 times [2024-06-27 19:21:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:02,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521445094] [2024-06-27 19:21:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521445094] [2024-06-27 19:21:02,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521445094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:02,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247243381] [2024-06-27 19:21:02,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:02,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:02,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:02,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:02,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 481 transitions, 6760 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:02,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:02,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:02,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:03,608 INFO L124 PetriNetUnfolderBase]: 2994/5066 cut-off events. [2024-06-27 19:21:03,608 INFO L125 PetriNetUnfolderBase]: For 344451/344466 co-relation queries the response was YES. [2024-06-27 19:21:03,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34172 conditions, 5066 events. 2994/5066 cut-off events. For 344451/344466 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 33726 event pairs, 619 based on Foata normal form. 13/5073 useless extension candidates. Maximal degree in co-relation 34008. Up to 4141 conditions per place. [2024-06-27 19:21:03,666 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 306 selfloop transitions, 201 changer transitions 0/514 dead transitions. [2024-06-27 19:21:03,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 514 transitions, 8202 flow [2024-06-27 19:21:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-27 19:21:03,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-27 19:21:03,667 INFO L175 Difference]: Start difference. First operand has 378 places, 481 transitions, 6760 flow. Second operand 9 states and 214 transitions. [2024-06-27 19:21:03,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 514 transitions, 8202 flow [2024-06-27 19:21:04,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 514 transitions, 7981 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:21:04,828 INFO L231 Difference]: Finished difference. Result has 384 places, 484 transitions, 6975 flow [2024-06-27 19:21:04,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6975, PETRI_PLACES=384, PETRI_TRANSITIONS=484} [2024-06-27 19:21:04,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 19:21:04,829 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 484 transitions, 6975 flow [2024-06-27 19:21:04,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:04,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:04,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:21:04,829 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:04,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 42343360, now seen corresponding path program 9 times [2024-06-27 19:21:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910724343] [2024-06-27 19:21:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:04,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:04,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910724343] [2024-06-27 19:21:04,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910724343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:04,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:04,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:04,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160804599] [2024-06-27 19:21:04,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:04,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:04,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:04,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:04,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:04,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 484 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:04,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:04,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:04,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:05,871 INFO L124 PetriNetUnfolderBase]: 2999/5075 cut-off events. [2024-06-27 19:21:05,871 INFO L125 PetriNetUnfolderBase]: For 352595/352610 co-relation queries the response was YES. [2024-06-27 19:21:05,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34469 conditions, 5075 events. 2999/5075 cut-off events. For 352595/352610 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 33835 event pairs, 629 based on Foata normal form. 13/5082 useless extension candidates. Maximal degree in co-relation 34304. Up to 4448 conditions per place. [2024-06-27 19:21:05,924 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 407 selfloop transitions, 93 changer transitions 0/507 dead transitions. [2024-06-27 19:21:05,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 507 transitions, 8236 flow [2024-06-27 19:21:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:05,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-27 19:21:05,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-27 19:21:05,925 INFO L175 Difference]: Start difference. First operand has 384 places, 484 transitions, 6975 flow. Second operand 9 states and 199 transitions. [2024-06-27 19:21:05,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 507 transitions, 8236 flow [2024-06-27 19:21:07,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 507 transitions, 7758 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:07,203 INFO L231 Difference]: Finished difference. Result has 385 places, 487 transitions, 6736 flow [2024-06-27 19:21:07,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6503, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6736, PETRI_PLACES=385, PETRI_TRANSITIONS=487} [2024-06-27 19:21:07,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-27 19:21:07,203 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 487 transitions, 6736 flow [2024-06-27 19:21:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:07,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:07,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:21:07,204 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:07,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:07,204 INFO L85 PathProgramCache]: Analyzing trace with hash 214118080, now seen corresponding path program 10 times [2024-06-27 19:21:07,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:07,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566486951] [2024-06-27 19:21:07,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:07,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:07,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:07,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566486951] [2024-06-27 19:21:07,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566486951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:07,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:07,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630289086] [2024-06-27 19:21:07,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:07,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:07,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:07,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 487 transitions, 6736 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:07,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:07,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:07,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:08,213 INFO L124 PetriNetUnfolderBase]: 3004/5084 cut-off events. [2024-06-27 19:21:08,214 INFO L125 PetriNetUnfolderBase]: For 358990/359005 co-relation queries the response was YES. [2024-06-27 19:21:08,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34213 conditions, 5084 events. 3004/5084 cut-off events. For 358990/359005 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33918 event pairs, 621 based on Foata normal form. 13/5091 useless extension candidates. Maximal degree in co-relation 34047. Up to 4153 conditions per place. [2024-06-27 19:21:08,273 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 225 changer transitions 0/519 dead transitions. [2024-06-27 19:21:08,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 519 transitions, 8189 flow [2024-06-27 19:21:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-27 19:21:08,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-27 19:21:08,274 INFO L175 Difference]: Start difference. First operand has 385 places, 487 transitions, 6736 flow. Second operand 11 states and 249 transitions. [2024-06-27 19:21:08,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 519 transitions, 8189 flow [2024-06-27 19:21:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 519 transitions, 7962 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:09,775 INFO L231 Difference]: Finished difference. Result has 388 places, 490 transitions, 6988 flow [2024-06-27 19:21:09,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6988, PETRI_PLACES=388, PETRI_TRANSITIONS=490} [2024-06-27 19:21:09,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-27 19:21:09,776 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 490 transitions, 6988 flow [2024-06-27 19:21:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:09,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:09,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:21:09,777 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:09,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash 214106920, now seen corresponding path program 11 times [2024-06-27 19:21:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:09,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971838873] [2024-06-27 19:21:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:09,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:09,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:09,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971838873] [2024-06-27 19:21:09,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971838873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:09,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:09,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:09,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113928572] [2024-06-27 19:21:09,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:09,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:09,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:09,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 490 transitions, 6988 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:09,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:09,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:09,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:10,855 INFO L124 PetriNetUnfolderBase]: 3001/5080 cut-off events. [2024-06-27 19:21:10,855 INFO L125 PetriNetUnfolderBase]: For 363323/363338 co-relation queries the response was YES. [2024-06-27 19:21:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34567 conditions, 5080 events. 3001/5080 cut-off events. For 363323/363338 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33852 event pairs, 629 based on Foata normal form. 13/5087 useless extension candidates. Maximal degree in co-relation 34400. Up to 4150 conditions per place. [2024-06-27 19:21:10,907 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 296 selfloop transitions, 214 changer transitions 0/517 dead transitions. [2024-06-27 19:21:10,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 517 transitions, 8244 flow [2024-06-27 19:21:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:21:10,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:10,909 INFO L175 Difference]: Start difference. First operand has 388 places, 490 transitions, 6988 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:21:10,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 517 transitions, 8244 flow [2024-06-27 19:21:12,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 517 transitions, 7774 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:12,767 INFO L231 Difference]: Finished difference. Result has 389 places, 490 transitions, 6955 flow [2024-06-27 19:21:12,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6518, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6955, PETRI_PLACES=389, PETRI_TRANSITIONS=490} [2024-06-27 19:21:12,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-27 19:21:12,767 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 490 transitions, 6955 flow [2024-06-27 19:21:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:12,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:12,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:21:12,768 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:12,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:12,769 INFO L85 PathProgramCache]: Analyzing trace with hash 42337780, now seen corresponding path program 12 times [2024-06-27 19:21:12,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:12,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709535923] [2024-06-27 19:21:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:12,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:12,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709535923] [2024-06-27 19:21:12,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709535923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:12,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:12,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:12,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101652636] [2024-06-27 19:21:12,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:12,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:12,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:12,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:12,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 490 transitions, 6955 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:12,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:12,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:12,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:13,791 INFO L124 PetriNetUnfolderBase]: 2998/5076 cut-off events. [2024-06-27 19:21:13,791 INFO L125 PetriNetUnfolderBase]: For 367106/367121 co-relation queries the response was YES. [2024-06-27 19:21:13,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34531 conditions, 5076 events. 2998/5076 cut-off events. For 367106/367121 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 33876 event pairs, 629 based on Foata normal form. 13/5083 useless extension candidates. Maximal degree in co-relation 34363. Up to 4448 conditions per place. [2024-06-27 19:21:13,852 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 410 selfloop transitions, 90 changer transitions 0/507 dead transitions. [2024-06-27 19:21:13,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 507 transitions, 7997 flow [2024-06-27 19:21:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:21:13,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:21:13,853 INFO L175 Difference]: Start difference. First operand has 389 places, 490 transitions, 6955 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:21:13,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 507 transitions, 7997 flow [2024-06-27 19:21:15,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 507 transitions, 7556 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:15,756 INFO L231 Difference]: Finished difference. Result has 387 places, 490 transitions, 6701 flow [2024-06-27 19:21:15,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6514, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6701, PETRI_PLACES=387, PETRI_TRANSITIONS=490} [2024-06-27 19:21:15,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 19:21:15,757 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 490 transitions, 6701 flow [2024-06-27 19:21:15,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:15,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:15,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:15,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:21:15,757 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:15,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:15,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1612785100, now seen corresponding path program 13 times [2024-06-27 19:21:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:15,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965241666] [2024-06-27 19:21:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:15,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:15,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965241666] [2024-06-27 19:21:15,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965241666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:15,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:15,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:15,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731757933] [2024-06-27 19:21:15,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:15,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:15,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:15,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:15,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:15,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:15,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 490 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:15,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:15,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:15,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:16,918 INFO L124 PetriNetUnfolderBase]: 3011/5098 cut-off events. [2024-06-27 19:21:16,918 INFO L125 PetriNetUnfolderBase]: For 378600/378615 co-relation queries the response was YES. [2024-06-27 19:21:16,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34414 conditions, 5098 events. 3011/5098 cut-off events. For 378600/378615 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 34018 event pairs, 617 based on Foata normal form. 13/5105 useless extension candidates. Maximal degree in co-relation 34245. Up to 4246 conditions per place. [2024-06-27 19:21:16,970 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 309 selfloop transitions, 205 changer transitions 0/521 dead transitions. [2024-06-27 19:21:16,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 521 transitions, 8201 flow [2024-06-27 19:21:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:16,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:21:16,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:16,971 INFO L175 Difference]: Start difference. First operand has 387 places, 490 transitions, 6701 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:21:16,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 521 transitions, 8201 flow [2024-06-27 19:21:18,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 521 transitions, 8021 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:18,675 INFO L231 Difference]: Finished difference. Result has 391 places, 496 transitions, 7001 flow [2024-06-27 19:21:18,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7001, PETRI_PLACES=391, PETRI_TRANSITIONS=496} [2024-06-27 19:21:18,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-27 19:21:18,676 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 496 transitions, 7001 flow [2024-06-27 19:21:18,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:18,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:18,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:21:18,676 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:18,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1612969240, now seen corresponding path program 14 times [2024-06-27 19:21:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:18,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557375048] [2024-06-27 19:21:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:18,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:18,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557375048] [2024-06-27 19:21:18,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557375048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:18,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:18,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:18,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682586670] [2024-06-27 19:21:18,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:18,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:18,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:18,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:18,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:18,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 496 transitions, 7001 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:18,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:18,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:18,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:19,676 INFO L124 PetriNetUnfolderBase]: 3016/5107 cut-off events. [2024-06-27 19:21:19,677 INFO L125 PetriNetUnfolderBase]: For 388062/388077 co-relation queries the response was YES. [2024-06-27 19:21:19,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34856 conditions, 5107 events. 3016/5107 cut-off events. For 388062/388077 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34181 event pairs, 619 based on Foata normal form. 13/5114 useless extension candidates. Maximal degree in co-relation 34686. Up to 4252 conditions per place. [2024-06-27 19:21:19,738 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 336 selfloop transitions, 181 changer transitions 0/524 dead transitions. [2024-06-27 19:21:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 524 transitions, 8484 flow [2024-06-27 19:21:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:21:19,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:21:19,739 INFO L175 Difference]: Start difference. First operand has 391 places, 496 transitions, 7001 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:21:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 524 transitions, 8484 flow [2024-06-27 19:21:21,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 524 transitions, 8062 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:21,673 INFO L231 Difference]: Finished difference. Result has 391 places, 499 transitions, 6987 flow [2024-06-27 19:21:21,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6585, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6987, PETRI_PLACES=391, PETRI_TRANSITIONS=499} [2024-06-27 19:21:21,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-27 19:21:21,673 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 499 transitions, 6987 flow [2024-06-27 19:21:21,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:21,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:21,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:21,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:21:21,674 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:21,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1613142220, now seen corresponding path program 15 times [2024-06-27 19:21:21,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49519665] [2024-06-27 19:21:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:21,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:21,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:21,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49519665] [2024-06-27 19:21:21,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49519665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:21,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:21,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:21,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958592443] [2024-06-27 19:21:21,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:21,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:21,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:21,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:21,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:21,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:21,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 499 transitions, 6987 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:21,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:21,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:21,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:22,827 INFO L124 PetriNetUnfolderBase]: 3013/5103 cut-off events. [2024-06-27 19:21:22,828 INFO L125 PetriNetUnfolderBase]: For 391961/391976 co-relation queries the response was YES. [2024-06-27 19:21:22,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34802 conditions, 5103 events. 3013/5103 cut-off events. For 391961/391976 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34077 event pairs, 619 based on Foata normal form. 13/5110 useless extension candidates. Maximal degree in co-relation 34631. Up to 4249 conditions per place. [2024-06-27 19:21:22,877 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 339 selfloop transitions, 182 changer transitions 0/528 dead transitions. [2024-06-27 19:21:22,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 528 transitions, 8457 flow [2024-06-27 19:21:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:21:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:21:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:21:22,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:21:22,878 INFO L175 Difference]: Start difference. First operand has 391 places, 499 transitions, 6987 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:21:22,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 528 transitions, 8457 flow [2024-06-27 19:21:24,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 528 transitions, 7995 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:21:24,894 INFO L231 Difference]: Finished difference. Result has 393 places, 499 transitions, 6904 flow [2024-06-27 19:21:24,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6525, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6904, PETRI_PLACES=393, PETRI_TRANSITIONS=499} [2024-06-27 19:21:24,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-27 19:21:24,894 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 499 transitions, 6904 flow [2024-06-27 19:21:24,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:24,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:24,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:24,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:21:24,895 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:24,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:24,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1613136640, now seen corresponding path program 16 times [2024-06-27 19:21:24,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:24,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412784783] [2024-06-27 19:21:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:24,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:24,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:24,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412784783] [2024-06-27 19:21:24,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412784783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:24,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:24,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:24,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834877319] [2024-06-27 19:21:24,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:24,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:24,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:24,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:25,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:25,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 499 transitions, 6904 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:25,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:25,955 INFO L124 PetriNetUnfolderBase]: 3018/5112 cut-off events. [2024-06-27 19:21:25,955 INFO L125 PetriNetUnfolderBase]: For 398111/398126 co-relation queries the response was YES. [2024-06-27 19:21:26,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34869 conditions, 5112 events. 3018/5112 cut-off events. For 398111/398126 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34200 event pairs, 629 based on Foata normal form. 13/5119 useless extension candidates. Maximal degree in co-relation 34697. Up to 4255 conditions per place. [2024-06-27 19:21:26,018 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 320 selfloop transitions, 201 changer transitions 0/528 dead transitions. [2024-06-27 19:21:26,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 528 transitions, 8228 flow [2024-06-27 19:21:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-27 19:21:26,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-27 19:21:26,019 INFO L175 Difference]: Start difference. First operand has 393 places, 499 transitions, 6904 flow. Second operand 9 states and 209 transitions. [2024-06-27 19:21:26,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 528 transitions, 8228 flow [2024-06-27 19:21:27,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 528 transitions, 7861 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:27,930 INFO L231 Difference]: Finished difference. Result has 395 places, 502 transitions, 6989 flow [2024-06-27 19:21:27,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6989, PETRI_PLACES=395, PETRI_TRANSITIONS=502} [2024-06-27 19:21:27,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 19:21:27,931 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 502 transitions, 6989 flow [2024-06-27 19:21:27,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:27,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:27,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:27,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:21:27,931 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:27,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1612958080, now seen corresponding path program 17 times [2024-06-27 19:21:27,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:27,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740277617] [2024-06-27 19:21:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:27,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740277617] [2024-06-27 19:21:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740277617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511520959] [2024-06-27 19:21:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:28,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:28,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 502 transitions, 6989 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:28,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:28,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:28,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:29,073 INFO L124 PetriNetUnfolderBase]: 3015/5108 cut-off events. [2024-06-27 19:21:29,073 INFO L125 PetriNetUnfolderBase]: For 393961/393976 co-relation queries the response was YES. [2024-06-27 19:21:29,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34814 conditions, 5108 events. 3015/5108 cut-off events. For 393961/393976 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34229 event pairs, 629 based on Foata normal form. 13/5115 useless extension candidates. Maximal degree in co-relation 34642. Up to 4252 conditions per place. [2024-06-27 19:21:29,129 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 327 selfloop transitions, 189 changer transitions 0/523 dead transitions. [2024-06-27 19:21:29,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 523 transitions, 8253 flow [2024-06-27 19:21:29,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:21:29,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:21:29,130 INFO L175 Difference]: Start difference. First operand has 395 places, 502 transitions, 6989 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:21:29,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 523 transitions, 8253 flow [2024-06-27 19:21:31,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 523 transitions, 7936 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:31,176 INFO L231 Difference]: Finished difference. Result has 395 places, 502 transitions, 7058 flow [2024-06-27 19:21:31,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7058, PETRI_PLACES=395, PETRI_TRANSITIONS=502} [2024-06-27 19:21:31,176 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 19:21:31,176 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 502 transitions, 7058 flow [2024-06-27 19:21:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:31,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:31,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:31,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:21:31,177 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:31,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1612790680, now seen corresponding path program 18 times [2024-06-27 19:21:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545285294] [2024-06-27 19:21:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:31,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:31,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:31,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545285294] [2024-06-27 19:21:31,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545285294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:31,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:31,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:31,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535745300] [2024-06-27 19:21:31,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:31,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:31,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:31,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:31,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 502 transitions, 7058 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:31,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:31,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:31,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:32,307 INFO L124 PetriNetUnfolderBase]: 3012/5104 cut-off events. [2024-06-27 19:21:32,307 INFO L125 PetriNetUnfolderBase]: For 390687/390702 co-relation queries the response was YES. [2024-06-27 19:21:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34734 conditions, 5104 events. 3012/5104 cut-off events. For 390687/390702 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 34168 event pairs, 625 based on Foata normal form. 13/5111 useless extension candidates. Maximal degree in co-relation 34562. Up to 4249 conditions per place. [2024-06-27 19:21:32,367 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 307 selfloop transitions, 212 changer transitions 0/526 dead transitions. [2024-06-27 19:21:32,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 526 transitions, 8154 flow [2024-06-27 19:21:32,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:32,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-27 19:21:32,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-27 19:21:32,368 INFO L175 Difference]: Start difference. First operand has 395 places, 502 transitions, 7058 flow. Second operand 11 states and 245 transitions. [2024-06-27 19:21:32,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 526 transitions, 8154 flow [2024-06-27 19:21:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 526 transitions, 7584 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 19:21:34,537 INFO L231 Difference]: Finished difference. Result has 398 places, 502 transitions, 6918 flow [2024-06-27 19:21:34,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6918, PETRI_PLACES=398, PETRI_TRANSITIONS=502} [2024-06-27 19:21:34,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2024-06-27 19:21:34,537 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 502 transitions, 6918 flow [2024-06-27 19:21:34,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:34,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:34,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:34,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:21:34,538 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:34,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:34,538 INFO L85 PathProgramCache]: Analyzing trace with hash -889043035, now seen corresponding path program 4 times [2024-06-27 19:21:34,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:34,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948728526] [2024-06-27 19:21:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:34,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:34,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:34,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948728526] [2024-06-27 19:21:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948728526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:34,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:34,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:34,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286748687] [2024-06-27 19:21:34,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:34,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:34,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:34,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 502 transitions, 6918 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:34,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:34,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:34,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:35,577 INFO L124 PetriNetUnfolderBase]: 3020/5110 cut-off events. [2024-06-27 19:21:35,577 INFO L125 PetriNetUnfolderBase]: For 401792/401795 co-relation queries the response was YES. [2024-06-27 19:21:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34843 conditions, 5110 events. 3020/5110 cut-off events. For 401792/401795 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34106 event pairs, 594 based on Foata normal form. 4/5109 useless extension candidates. Maximal degree in co-relation 34670. Up to 4581 conditions per place. [2024-06-27 19:21:35,637 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 462 selfloop transitions, 55 changer transitions 0/524 dead transitions. [2024-06-27 19:21:35,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 524 transitions, 8055 flow [2024-06-27 19:21:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-27 19:21:35,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-27 19:21:35,638 INFO L175 Difference]: Start difference. First operand has 398 places, 502 transitions, 6918 flow. Second operand 9 states and 197 transitions. [2024-06-27 19:21:35,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 524 transitions, 8055 flow [2024-06-27 19:21:37,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 524 transitions, 7385 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-27 19:21:37,643 INFO L231 Difference]: Finished difference. Result has 394 places, 504 transitions, 6422 flow [2024-06-27 19:21:37,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6422, PETRI_PLACES=394, PETRI_TRANSITIONS=504} [2024-06-27 19:21:37,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 353 predicate places. [2024-06-27 19:21:37,644 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 504 transitions, 6422 flow [2024-06-27 19:21:37,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:37,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:37,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:37,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:21:37,645 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:37,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:37,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1910822460, now seen corresponding path program 19 times [2024-06-27 19:21:37,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:37,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631983734] [2024-06-27 19:21:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:37,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631983734] [2024-06-27 19:21:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631983734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:37,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661801906] [2024-06-27 19:21:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:37,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:37,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:37,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 504 transitions, 6422 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:37,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:37,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:37,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:38,693 INFO L124 PetriNetUnfolderBase]: 3033/5138 cut-off events. [2024-06-27 19:21:38,693 INFO L125 PetriNetUnfolderBase]: For 408972/408987 co-relation queries the response was YES. [2024-06-27 19:21:38,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34561 conditions, 5138 events. 3033/5138 cut-off events. For 408972/408987 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34385 event pairs, 619 based on Foata normal form. 13/5145 useless extension candidates. Maximal degree in co-relation 34387. Up to 4181 conditions per place. [2024-06-27 19:21:38,755 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 262 selfloop transitions, 269 changer transitions 0/538 dead transitions. [2024-06-27 19:21:38,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 538 transitions, 7974 flow [2024-06-27 19:21:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-27 19:21:38,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-27 19:21:38,756 INFO L175 Difference]: Start difference. First operand has 394 places, 504 transitions, 6422 flow. Second operand 10 states and 228 transitions. [2024-06-27 19:21:38,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 538 transitions, 7974 flow [2024-06-27 19:21:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 538 transitions, 7827 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:40,662 INFO L231 Difference]: Finished difference. Result has 397 places, 510 transitions, 6877 flow [2024-06-27 19:21:40,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6877, PETRI_PLACES=397, PETRI_TRANSITIONS=510} [2024-06-27 19:21:40,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-27 19:21:40,662 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 510 transitions, 6877 flow [2024-06-27 19:21:40,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:40,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:40,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:40,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:21:40,662 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:40,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:40,663 INFO L85 PathProgramCache]: Analyzing trace with hash 402435752, now seen corresponding path program 20 times [2024-06-27 19:21:40,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:40,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179103701] [2024-06-27 19:21:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:40,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:40,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:40,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179103701] [2024-06-27 19:21:40,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179103701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:40,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:40,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:40,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666742600] [2024-06-27 19:21:40,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:40,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:40,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:40,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:40,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:40,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:40,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 510 transitions, 6877 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:40,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:40,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:40,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:41,703 INFO L124 PetriNetUnfolderBase]: 3030/5131 cut-off events. [2024-06-27 19:21:41,704 INFO L125 PetriNetUnfolderBase]: For 414329/414338 co-relation queries the response was YES. [2024-06-27 19:21:41,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35026 conditions, 5131 events. 3030/5131 cut-off events. For 414329/414338 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 34309 event pairs, 654 based on Foata normal form. 5/5128 useless extension candidates. Maximal degree in co-relation 34851. Up to 4178 conditions per place. [2024-06-27 19:21:41,764 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 269 changer transitions 0/528 dead transitions. [2024-06-27 19:21:41,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 528 transitions, 8147 flow [2024-06-27 19:21:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:21:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:21:41,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-27 19:21:41,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 19:21:41,765 INFO L175 Difference]: Start difference. First operand has 397 places, 510 transitions, 6877 flow. Second operand 10 states and 220 transitions. [2024-06-27 19:21:41,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 528 transitions, 8147 flow [2024-06-27 19:21:43,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 528 transitions, 7763 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:21:43,669 INFO L231 Difference]: Finished difference. Result has 400 places, 510 transitions, 7039 flow [2024-06-27 19:21:43,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=400, PETRI_TRANSITIONS=510} [2024-06-27 19:21:43,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 359 predicate places. [2024-06-27 19:21:43,669 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 510 transitions, 7039 flow [2024-06-27 19:21:43,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:43,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:43,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:21:43,670 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:43,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 62610962, now seen corresponding path program 21 times [2024-06-27 19:21:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:43,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942603391] [2024-06-27 19:21:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:43,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:43,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:43,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942603391] [2024-06-27 19:21:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942603391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:43,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892225828] [2024-06-27 19:21:43,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:43,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:43,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 510 transitions, 7039 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:43,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:44,730 INFO L124 PetriNetUnfolderBase]: 3035/5143 cut-off events. [2024-06-27 19:21:44,730 INFO L125 PetriNetUnfolderBase]: For 413880/413895 co-relation queries the response was YES. [2024-06-27 19:21:44,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35150 conditions, 5143 events. 3035/5143 cut-off events. For 413880/413895 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34431 event pairs, 629 based on Foata normal form. 13/5150 useless extension candidates. Maximal degree in co-relation 34975. Up to 4184 conditions per place. [2024-06-27 19:21:44,790 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 250 changer transitions 0/545 dead transitions. [2024-06-27 19:21:44,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 545 transitions, 8413 flow [2024-06-27 19:21:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:21:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:21:44,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:21:44,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-27 19:21:44,791 INFO L175 Difference]: Start difference. First operand has 400 places, 510 transitions, 7039 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:21:44,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 545 transitions, 8413 flow [2024-06-27 19:21:46,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 545 transitions, 7652 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 19:21:46,629 INFO L231 Difference]: Finished difference. Result has 399 places, 513 transitions, 6825 flow [2024-06-27 19:21:46,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6287, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6825, PETRI_PLACES=399, PETRI_TRANSITIONS=513} [2024-06-27 19:21:46,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-27 19:21:46,630 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 513 transitions, 6825 flow [2024-06-27 19:21:46,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:46,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:46,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:46,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:21:46,630 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:46,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 62616542, now seen corresponding path program 22 times [2024-06-27 19:21:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:46,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449273511] [2024-06-27 19:21:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:46,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:46,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449273511] [2024-06-27 19:21:46,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449273511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:46,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:46,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:46,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233923330] [2024-06-27 19:21:46,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:46,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:46,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 513 transitions, 6825 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:46,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:46,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:46,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:47,668 INFO L124 PetriNetUnfolderBase]: 3032/5139 cut-off events. [2024-06-27 19:21:47,669 INFO L125 PetriNetUnfolderBase]: For 417863/417878 co-relation queries the response was YES. [2024-06-27 19:21:47,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34971 conditions, 5139 events. 3032/5139 cut-off events. For 417863/417878 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34427 event pairs, 619 based on Foata normal form. 13/5146 useless extension candidates. Maximal degree in co-relation 34795. Up to 4181 conditions per place. [2024-06-27 19:21:47,729 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 254 changer transitions 0/546 dead transitions. [2024-06-27 19:21:47,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 546 transitions, 7985 flow [2024-06-27 19:21:47,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:21:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:21:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-27 19:21:47,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:21:47,730 INFO L175 Difference]: Start difference. First operand has 399 places, 513 transitions, 6825 flow. Second operand 11 states and 253 transitions. [2024-06-27 19:21:47,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 546 transitions, 7985 flow [2024-06-27 19:21:49,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 546 transitions, 7477 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:21:49,429 INFO L231 Difference]: Finished difference. Result has 401 places, 513 transitions, 6839 flow [2024-06-27 19:21:49,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6317, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6839, PETRI_PLACES=401, PETRI_TRANSITIONS=513} [2024-06-27 19:21:49,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 19:21:49,429 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 513 transitions, 6839 flow [2024-06-27 19:21:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:49,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:49,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:49,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:21:49,430 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:49,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:49,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1081811187, now seen corresponding path program 5 times [2024-06-27 19:21:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:49,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099936993] [2024-06-27 19:21:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:49,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:49,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:49,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099936993] [2024-06-27 19:21:49,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099936993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:49,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:49,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726862519] [2024-06-27 19:21:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:49,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 513 transitions, 6839 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:49,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:50,600 INFO L124 PetriNetUnfolderBase]: 3158/5323 cut-off events. [2024-06-27 19:21:50,600 INFO L125 PetriNetUnfolderBase]: For 502890/502905 co-relation queries the response was YES. [2024-06-27 19:21:50,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 5323 events. 3158/5323 cut-off events. For 502890/502905 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 35534 event pairs, 663 based on Foata normal form. 14/5330 useless extension candidates. Maximal degree in co-relation 38085. Up to 4537 conditions per place. [2024-06-27 19:21:50,653 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 451 selfloop transitions, 87 changer transitions 0/545 dead transitions. [2024-06-27 19:21:50,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 545 transitions, 8330 flow [2024-06-27 19:21:50,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:21:50,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:21:50,654 INFO L175 Difference]: Start difference. First operand has 401 places, 513 transitions, 6839 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:21:50,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 545 transitions, 8330 flow [2024-06-27 19:21:52,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 545 transitions, 7718 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-27 19:21:52,949 INFO L231 Difference]: Finished difference. Result has 396 places, 519 transitions, 6579 flow [2024-06-27 19:21:52,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6579, PETRI_PLACES=396, PETRI_TRANSITIONS=519} [2024-06-27 19:21:52,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-27 19:21:52,950 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 519 transitions, 6579 flow [2024-06-27 19:21:52,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:52,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:52,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:52,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:21:52,951 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:52,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1084668147, now seen corresponding path program 6 times [2024-06-27 19:21:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413379156] [2024-06-27 19:21:52,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413379156] [2024-06-27 19:21:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413379156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:53,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709028705] [2024-06-27 19:21:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:53,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:53,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:53,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:53,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 519 transitions, 6579 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:53,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:53,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:53,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:54,007 INFO L124 PetriNetUnfolderBase]: 3166/5341 cut-off events. [2024-06-27 19:21:54,007 INFO L125 PetriNetUnfolderBase]: For 494099/494114 co-relation queries the response was YES. [2024-06-27 19:21:54,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38063 conditions, 5341 events. 3166/5341 cut-off events. For 494099/494114 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 35743 event pairs, 659 based on Foata normal form. 14/5349 useless extension candidates. Maximal degree in co-relation 37888. Up to 4689 conditions per place. [2024-06-27 19:21:54,072 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 82 changer transitions 0/539 dead transitions. [2024-06-27 19:21:54,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 539 transitions, 7742 flow [2024-06-27 19:21:54,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 19:21:54,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-27 19:21:54,073 INFO L175 Difference]: Start difference. First operand has 396 places, 519 transitions, 6579 flow. Second operand 7 states and 162 transitions. [2024-06-27 19:21:54,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 539 transitions, 7742 flow [2024-06-27 19:21:56,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 539 transitions, 7531 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:21:56,740 INFO L231 Difference]: Finished difference. Result has 399 places, 521 transitions, 6596 flow [2024-06-27 19:21:56,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6596, PETRI_PLACES=399, PETRI_TRANSITIONS=521} [2024-06-27 19:21:56,740 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-27 19:21:56,740 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 521 transitions, 6596 flow [2024-06-27 19:21:56,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:56,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:21:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:21:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:21:56,741 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:21:56,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:21:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1235986139, now seen corresponding path program 7 times [2024-06-27 19:21:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:21:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869780957] [2024-06-27 19:21:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:21:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:21:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:21:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:21:56,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:21:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869780957] [2024-06-27 19:21:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869780957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:21:56,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:21:56,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:21:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008581844] [2024-06-27 19:21:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:21:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:21:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:21:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:21:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:21:56,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:21:56,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 521 transitions, 6596 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:21:56,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:21:56,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:21:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:21:57,822 INFO L124 PetriNetUnfolderBase]: 3259/5480 cut-off events. [2024-06-27 19:21:57,823 INFO L125 PetriNetUnfolderBase]: For 566002/566017 co-relation queries the response was YES. [2024-06-27 19:21:57,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40523 conditions, 5480 events. 3259/5480 cut-off events. For 566002/566017 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36565 event pairs, 547 based on Foata normal form. 14/5488 useless extension candidates. Maximal degree in co-relation 40347. Up to 3744 conditions per place. [2024-06-27 19:21:57,889 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 442 selfloop transitions, 111 changer transitions 0/560 dead transitions. [2024-06-27 19:21:57,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 560 transitions, 8394 flow [2024-06-27 19:21:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:21:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:21:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:21:57,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-27 19:21:57,890 INFO L175 Difference]: Start difference. First operand has 399 places, 521 transitions, 6596 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:21:57,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 560 transitions, 8394 flow [2024-06-27 19:22:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 560 transitions, 8201 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:00,702 INFO L231 Difference]: Finished difference. Result has 402 places, 529 transitions, 6858 flow [2024-06-27 19:22:00,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6403, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6858, PETRI_PLACES=402, PETRI_TRANSITIONS=529} [2024-06-27 19:22:00,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 361 predicate places. [2024-06-27 19:22:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 529 transitions, 6858 flow [2024-06-27 19:22:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:22:00,704 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 739920115, now seen corresponding path program 8 times [2024-06-27 19:22:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009564458] [2024-06-27 19:22:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:00,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:00,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009564458] [2024-06-27 19:22:00,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009564458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:00,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:00,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794606152] [2024-06-27 19:22:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:00,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:00,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:00,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:00,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:00,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:00,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 529 transitions, 6858 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:00,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:00,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:01,953 INFO L124 PetriNetUnfolderBase]: 3241/5454 cut-off events. [2024-06-27 19:22:01,954 INFO L125 PetriNetUnfolderBase]: For 571669/571684 co-relation queries the response was YES. [2024-06-27 19:22:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40268 conditions, 5454 events. 3241/5454 cut-off events. For 571669/571684 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36446 event pairs, 582 based on Foata normal form. 20/5468 useless extension candidates. Maximal degree in co-relation 40090. Up to 3736 conditions per place. [2024-06-27 19:22:02,021 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 447 selfloop transitions, 104 changer transitions 0/558 dead transitions. [2024-06-27 19:22:02,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 558 transitions, 8444 flow [2024-06-27 19:22:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:22:02,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:22:02,022 INFO L175 Difference]: Start difference. First operand has 402 places, 529 transitions, 6858 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:22:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 558 transitions, 8444 flow [2024-06-27 19:22:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 558 transitions, 8246 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-27 19:22:04,300 INFO L231 Difference]: Finished difference. Result has 406 places, 529 transitions, 6874 flow [2024-06-27 19:22:04,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6660, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6874, PETRI_PLACES=406, PETRI_TRANSITIONS=529} [2024-06-27 19:22:04,300 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 365 predicate places. [2024-06-27 19:22:04,301 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 529 transitions, 6874 flow [2024-06-27 19:22:04,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:04,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:04,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:04,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:22:04,301 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:04,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -818079501, now seen corresponding path program 9 times [2024-06-27 19:22:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174382833] [2024-06-27 19:22:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:04,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:04,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174382833] [2024-06-27 19:22:04,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174382833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:04,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:04,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:04,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787133942] [2024-06-27 19:22:04,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:04,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:04,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:04,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:04,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:04,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:04,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 529 transitions, 6874 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:04,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:04,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:04,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:05,405 INFO L124 PetriNetUnfolderBase]: 3218/5421 cut-off events. [2024-06-27 19:22:05,405 INFO L125 PetriNetUnfolderBase]: For 546818/546833 co-relation queries the response was YES. [2024-06-27 19:22:05,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39093 conditions, 5421 events. 3218/5421 cut-off events. For 546818/546833 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36307 event pairs, 675 based on Foata normal form. 22/5437 useless extension candidates. Maximal degree in co-relation 38914. Up to 4737 conditions per place. [2024-06-27 19:22:05,471 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 461 selfloop transitions, 79 changer transitions 0/547 dead transitions. [2024-06-27 19:22:05,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 547 transitions, 8018 flow [2024-06-27 19:22:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:05,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-27 19:22:05,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-27 19:22:05,472 INFO L175 Difference]: Start difference. First operand has 406 places, 529 transitions, 6874 flow. Second operand 7 states and 163 transitions. [2024-06-27 19:22:05,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 547 transitions, 8018 flow [2024-06-27 19:22:07,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 547 transitions, 7801 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:22:07,741 INFO L231 Difference]: Finished difference. Result has 409 places, 529 transitions, 6821 flow [2024-06-27 19:22:07,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6821, PETRI_PLACES=409, PETRI_TRANSITIONS=529} [2024-06-27 19:22:07,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-27 19:22:07,741 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 529 transitions, 6821 flow [2024-06-27 19:22:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:07,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:07,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:22:07,742 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:07,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:07,742 INFO L85 PathProgramCache]: Analyzing trace with hash -809508621, now seen corresponding path program 10 times [2024-06-27 19:22:07,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:07,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008963398] [2024-06-27 19:22:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:07,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:07,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:07,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008963398] [2024-06-27 19:22:07,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008963398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:07,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:07,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:07,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39541403] [2024-06-27 19:22:07,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:07,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:07,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:07,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:07,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:07,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 529 transitions, 6821 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:07,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:07,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:07,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:08,807 INFO L124 PetriNetUnfolderBase]: 3195/5388 cut-off events. [2024-06-27 19:22:08,808 INFO L125 PetriNetUnfolderBase]: For 508076/508091 co-relation queries the response was YES. [2024-06-27 19:22:08,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37564 conditions, 5388 events. 3195/5388 cut-off events. For 508076/508091 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 36137 event pairs, 648 based on Foata normal form. 22/5404 useless extension candidates. Maximal degree in co-relation 37384. Up to 4476 conditions per place. [2024-06-27 19:22:08,873 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 460 selfloop transitions, 85 changer transitions 0/552 dead transitions. [2024-06-27 19:22:08,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 552 transitions, 8199 flow [2024-06-27 19:22:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:08,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:08,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:22:08,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:22:08,874 INFO L175 Difference]: Start difference. First operand has 409 places, 529 transitions, 6821 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:22:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 552 transitions, 8199 flow [2024-06-27 19:22:10,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 552 transitions, 8021 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:10,716 INFO L231 Difference]: Finished difference. Result has 411 places, 529 transitions, 6820 flow [2024-06-27 19:22:10,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6643, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6820, PETRI_PLACES=411, PETRI_TRANSITIONS=529} [2024-06-27 19:22:10,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-27 19:22:10,717 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 529 transitions, 6820 flow [2024-06-27 19:22:10,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:10,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:10,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:10,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:22:10,717 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:10,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1107822315, now seen corresponding path program 11 times [2024-06-27 19:22:10,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:10,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541708116] [2024-06-27 19:22:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:10,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:10,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:10,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541708116] [2024-06-27 19:22:10,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541708116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:10,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:10,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:10,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405060162] [2024-06-27 19:22:10,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:10,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:10,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:10,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:10,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 529 transitions, 6820 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:10,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:10,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:10,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:11,822 INFO L124 PetriNetUnfolderBase]: 3183/5339 cut-off events. [2024-06-27 19:22:11,822 INFO L125 PetriNetUnfolderBase]: For 470815/470815 co-relation queries the response was YES. [2024-06-27 19:22:11,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37278 conditions, 5339 events. 3183/5339 cut-off events. For 470815/470815 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35520 event pairs, 627 based on Foata normal form. 2/5324 useless extension candidates. Maximal degree in co-relation 37097. Up to 4523 conditions per place. [2024-06-27 19:22:11,886 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 116 changer transitions 0/558 dead transitions. [2024-06-27 19:22:11,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 558 transitions, 8208 flow [2024-06-27 19:22:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:22:11,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:22:11,887 INFO L175 Difference]: Start difference. First operand has 411 places, 529 transitions, 6820 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:22:11,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 558 transitions, 8208 flow [2024-06-27 19:22:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 558 transitions, 8023 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:22:13,935 INFO L231 Difference]: Finished difference. Result has 414 places, 529 transitions, 6875 flow [2024-06-27 19:22:13,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6875, PETRI_PLACES=414, PETRI_TRANSITIONS=529} [2024-06-27 19:22:13,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2024-06-27 19:22:13,935 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 529 transitions, 6875 flow [2024-06-27 19:22:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:13,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:13,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:13,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:22:13,936 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:13,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash 254437967, now seen corresponding path program 12 times [2024-06-27 19:22:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887107826] [2024-06-27 19:22:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:14,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887107826] [2024-06-27 19:22:14,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887107826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:14,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:14,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:14,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331009477] [2024-06-27 19:22:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:14,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:14,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:14,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:14,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 529 transitions, 6875 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:14,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:14,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:14,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:14,998 INFO L124 PetriNetUnfolderBase]: 3171/5333 cut-off events. [2024-06-27 19:22:14,998 INFO L125 PetriNetUnfolderBase]: For 469058/469058 co-relation queries the response was YES. [2024-06-27 19:22:15,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37038 conditions, 5333 events. 3171/5333 cut-off events. For 469058/469058 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 35605 event pairs, 643 based on Foata normal form. 2/5324 useless extension candidates. Maximal degree in co-relation 36856. Up to 4690 conditions per place. [2024-06-27 19:22:15,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 441 selfloop transitions, 102 changer transitions 0/550 dead transitions. [2024-06-27 19:22:15,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 550 transitions, 8013 flow [2024-06-27 19:22:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:22:15,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-27 19:22:15,065 INFO L175 Difference]: Start difference. First operand has 414 places, 529 transitions, 6875 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:22:15,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 550 transitions, 8013 flow [2024-06-27 19:22:17,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 550 transitions, 7639 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-27 19:22:17,129 INFO L231 Difference]: Finished difference. Result has 412 places, 529 transitions, 6713 flow [2024-06-27 19:22:17,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6713, PETRI_PLACES=412, PETRI_TRANSITIONS=529} [2024-06-27 19:22:17,129 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-27 19:22:17,129 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 529 transitions, 6713 flow [2024-06-27 19:22:17,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:17,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:17,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:17,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:22:17,129 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:17,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:17,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1230286263, now seen corresponding path program 13 times [2024-06-27 19:22:17,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:17,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108822451] [2024-06-27 19:22:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:17,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108822451] [2024-06-27 19:22:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108822451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:17,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:17,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:17,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483926272] [2024-06-27 19:22:17,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:17,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:17,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:17,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:17,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 529 transitions, 6713 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:17,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:17,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:17,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:18,197 INFO L124 PetriNetUnfolderBase]: 3179/5348 cut-off events. [2024-06-27 19:22:18,198 INFO L125 PetriNetUnfolderBase]: For 465872/465875 co-relation queries the response was YES. [2024-06-27 19:22:18,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36622 conditions, 5348 events. 3179/5348 cut-off events. For 465872/465875 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35752 event pairs, 631 based on Foata normal form. 4/5345 useless extension candidates. Maximal degree in co-relation 36441. Up to 4807 conditions per place. [2024-06-27 19:22:18,262 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 484 selfloop transitions, 58 changer transitions 0/549 dead transitions. [2024-06-27 19:22:18,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 549 transitions, 7894 flow [2024-06-27 19:22:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:22:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:22:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-27 19:22:18,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-27 19:22:18,263 INFO L175 Difference]: Start difference. First operand has 412 places, 529 transitions, 6713 flow. Second operand 7 states and 161 transitions. [2024-06-27 19:22:18,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 549 transitions, 7894 flow [2024-06-27 19:22:20,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 549 transitions, 7638 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:20,334 INFO L231 Difference]: Finished difference. Result has 411 places, 531 transitions, 6641 flow [2024-06-27 19:22:20,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6641, PETRI_PLACES=411, PETRI_TRANSITIONS=531} [2024-06-27 19:22:20,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-27 19:22:20,335 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 531 transitions, 6641 flow [2024-06-27 19:22:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:20,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:20,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:20,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:22:20,335 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:20,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1482292959, now seen corresponding path program 14 times [2024-06-27 19:22:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471796093] [2024-06-27 19:22:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:20,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471796093] [2024-06-27 19:22:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471796093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:20,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:20,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207615174] [2024-06-27 19:22:20,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:20,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:20,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:20,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 531 transitions, 6641 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:20,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:20,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:20,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:21,478 INFO L124 PetriNetUnfolderBase]: 3156/5318 cut-off events. [2024-06-27 19:22:21,478 INFO L125 PetriNetUnfolderBase]: For 456989/457004 co-relation queries the response was YES. [2024-06-27 19:22:21,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35248 conditions, 5318 events. 3156/5318 cut-off events. For 456989/457004 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35604 event pairs, 642 based on Foata normal form. 22/5334 useless extension candidates. Maximal degree in co-relation 35067. Up to 4655 conditions per place. [2024-06-27 19:22:21,538 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 70 changer transitions 0/554 dead transitions. [2024-06-27 19:22:21,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 554 transitions, 7813 flow [2024-06-27 19:22:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:22:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:22:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:22:21,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-27 19:22:21,539 INFO L175 Difference]: Start difference. First operand has 411 places, 531 transitions, 6641 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:22:21,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 554 transitions, 7813 flow [2024-06-27 19:22:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 554 transitions, 7650 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:23,589 INFO L231 Difference]: Finished difference. Result has 412 places, 531 transitions, 6627 flow [2024-06-27 19:22:23,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6478, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6627, PETRI_PLACES=412, PETRI_TRANSITIONS=531} [2024-06-27 19:22:23,590 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-27 19:22:23,590 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 531 transitions, 6627 flow [2024-06-27 19:22:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:23,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:23,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:23,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:22:23,590 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash -225735639, now seen corresponding path program 15 times [2024-06-27 19:22:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430549588] [2024-06-27 19:22:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:23,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:23,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:23,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430549588] [2024-06-27 19:22:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430549588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:23,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:23,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:23,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471433564] [2024-06-27 19:22:23,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:23,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:23,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:23,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:23,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 531 transitions, 6627 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:24,700 INFO L124 PetriNetUnfolderBase]: 3110/5239 cut-off events. [2024-06-27 19:22:24,701 INFO L125 PetriNetUnfolderBase]: For 412988/412991 co-relation queries the response was YES. [2024-06-27 19:22:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32713 conditions, 5239 events. 3110/5239 cut-off events. For 412988/412991 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35040 event pairs, 590 based on Foata normal form. 22/5254 useless extension candidates. Maximal degree in co-relation 32531. Up to 4515 conditions per place. [2024-06-27 19:22:24,763 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 460 selfloop transitions, 98 changer transitions 0/565 dead transitions. [2024-06-27 19:22:24,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 565 transitions, 7849 flow [2024-06-27 19:22:24,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 19:22:24,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-27 19:22:24,764 INFO L175 Difference]: Start difference. First operand has 412 places, 531 transitions, 6627 flow. Second operand 8 states and 201 transitions. [2024-06-27 19:22:24,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 565 transitions, 7849 flow [2024-06-27 19:22:26,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 565 transitions, 7662 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:22:26,864 INFO L231 Difference]: Finished difference. Result has 415 places, 531 transitions, 6661 flow [2024-06-27 19:22:26,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6440, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6661, PETRI_PLACES=415, PETRI_TRANSITIONS=531} [2024-06-27 19:22:26,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-27 19:22:26,865 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 531 transitions, 6661 flow [2024-06-27 19:22:26,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:26,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:26,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:26,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:22:26,865 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:26,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash 11925683, now seen corresponding path program 16 times [2024-06-27 19:22:26,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088324342] [2024-06-27 19:22:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:26,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:26,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088324342] [2024-06-27 19:22:26,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088324342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:26,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715834798] [2024-06-27 19:22:26,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:26,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:27,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:27,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 531 transitions, 6661 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:27,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:27,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:27,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:28,172 INFO L124 PetriNetUnfolderBase]: 3080/5209 cut-off events. [2024-06-27 19:22:28,172 INFO L125 PetriNetUnfolderBase]: For 318792/318807 co-relation queries the response was YES. [2024-06-27 19:22:28,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31419 conditions, 5209 events. 3080/5209 cut-off events. For 318792/318807 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 35006 event pairs, 506 based on Foata normal form. 22/5225 useless extension candidates. Maximal degree in co-relation 31236. Up to 4086 conditions per place. [2024-06-27 19:22:28,222 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 465 selfloop transitions, 86 changer transitions 0/558 dead transitions. [2024-06-27 19:22:28,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 558 transitions, 7871 flow [2024-06-27 19:22:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:22:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:22:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:22:28,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-27 19:22:28,223 INFO L175 Difference]: Start difference. First operand has 415 places, 531 transitions, 6661 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:22:28,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 558 transitions, 7871 flow [2024-06-27 19:22:29,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 558 transitions, 7633 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:29,948 INFO L231 Difference]: Finished difference. Result has 413 places, 531 transitions, 6606 flow [2024-06-27 19:22:29,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6423, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6606, PETRI_PLACES=413, PETRI_TRANSITIONS=531} [2024-06-27 19:22:29,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-27 19:22:29,949 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 531 transitions, 6606 flow [2024-06-27 19:22:29,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:29,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:29,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:29,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:22:29,949 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:29,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -961830675, now seen corresponding path program 1 times [2024-06-27 19:22:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487887708] [2024-06-27 19:22:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:30,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:30,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487887708] [2024-06-27 19:22:30,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487887708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:30,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:30,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:30,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720405491] [2024-06-27 19:22:30,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:30,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:30,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:30,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:30,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 531 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:30,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:30,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:31,200 INFO L124 PetriNetUnfolderBase]: 3407/5722 cut-off events. [2024-06-27 19:22:31,201 INFO L125 PetriNetUnfolderBase]: For 579544/579544 co-relation queries the response was YES. [2024-06-27 19:22:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39603 conditions, 5722 events. 3407/5722 cut-off events. For 579544/579544 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38218 event pairs, 634 based on Foata normal form. 6/5696 useless extension candidates. Maximal degree in co-relation 39420. Up to 2633 conditions per place. [2024-06-27 19:22:31,275 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 327 changer transitions 0/589 dead transitions. [2024-06-27 19:22:31,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 589 transitions, 8454 flow [2024-06-27 19:22:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:31,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 19:22:31,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-06-27 19:22:31,277 INFO L175 Difference]: Start difference. First operand has 413 places, 531 transitions, 6606 flow. Second operand 9 states and 237 transitions. [2024-06-27 19:22:31,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 589 transitions, 8454 flow [2024-06-27 19:22:34,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 589 transitions, 8219 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:22:34,077 INFO L231 Difference]: Finished difference. Result has 415 places, 534 transitions, 7113 flow [2024-06-27 19:22:34,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7113, PETRI_PLACES=415, PETRI_TRANSITIONS=534} [2024-06-27 19:22:34,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-27 19:22:34,078 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 534 transitions, 7113 flow [2024-06-27 19:22:34,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:34,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:34,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:22:34,078 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:34,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1207427609, now seen corresponding path program 1 times [2024-06-27 19:22:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072346286] [2024-06-27 19:22:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:34,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:34,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072346286] [2024-06-27 19:22:34,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072346286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:34,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:34,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876017786] [2024-06-27 19:22:34,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:34,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 534 transitions, 7113 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:34,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:34,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:34,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:35,433 INFO L124 PetriNetUnfolderBase]: 3514/5919 cut-off events. [2024-06-27 19:22:35,433 INFO L125 PetriNetUnfolderBase]: For 648096/648111 co-relation queries the response was YES. [2024-06-27 19:22:35,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42227 conditions, 5919 events. 3514/5919 cut-off events. For 648096/648111 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 39982 event pairs, 670 based on Foata normal form. 18/5931 useless extension candidates. Maximal degree in co-relation 42044. Up to 4442 conditions per place. [2024-06-27 19:22:35,494 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 449 selfloop transitions, 121 changer transitions 0/577 dead transitions. [2024-06-27 19:22:35,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 577 transitions, 8845 flow [2024-06-27 19:22:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 19:22:35,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-27 19:22:35,495 INFO L175 Difference]: Start difference. First operand has 415 places, 534 transitions, 7113 flow. Second operand 8 states and 196 transitions. [2024-06-27 19:22:35,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 577 transitions, 8845 flow [2024-06-27 19:22:38,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 577 transitions, 8395 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:22:38,555 INFO L231 Difference]: Finished difference. Result has 420 places, 539 transitions, 6986 flow [2024-06-27 19:22:38,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6665, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6986, PETRI_PLACES=420, PETRI_TRANSITIONS=539} [2024-06-27 19:22:38,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 19:22:38,556 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 539 transitions, 6986 flow [2024-06-27 19:22:38,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:38,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:22:38,556 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:38,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -961710705, now seen corresponding path program 2 times [2024-06-27 19:22:38,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:38,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36211952] [2024-06-27 19:22:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:38,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:38,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:38,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36211952] [2024-06-27 19:22:38,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36211952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:38,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:38,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:38,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414879205] [2024-06-27 19:22:38,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:38,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:38,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:38,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:38,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:38,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 539 transitions, 6986 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:38,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:38,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:38,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:39,899 INFO L124 PetriNetUnfolderBase]: 3534/5944 cut-off events. [2024-06-27 19:22:39,899 INFO L125 PetriNetUnfolderBase]: For 660124/660127 co-relation queries the response was YES. [2024-06-27 19:22:39,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42577 conditions, 5944 events. 3534/5944 cut-off events. For 660124/660127 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40120 event pairs, 644 based on Foata normal form. 8/5940 useless extension candidates. Maximal degree in co-relation 42391. Up to 4870 conditions per place. [2024-06-27 19:22:39,976 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 431 selfloop transitions, 145 changer transitions 0/583 dead transitions. [2024-06-27 19:22:39,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 583 transitions, 8306 flow [2024-06-27 19:22:39,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:22:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:22:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:22:39,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-27 19:22:39,977 INFO L175 Difference]: Start difference. First operand has 420 places, 539 transitions, 6986 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:22:39,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 583 transitions, 8306 flow [2024-06-27 19:22:43,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 583 transitions, 8179 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 19:22:43,823 INFO L231 Difference]: Finished difference. Result has 427 places, 540 transitions, 7173 flow [2024-06-27 19:22:43,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6859, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7173, PETRI_PLACES=427, PETRI_TRANSITIONS=540} [2024-06-27 19:22:43,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 19:22:43,824 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 540 transitions, 7173 flow [2024-06-27 19:22:43,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:43,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:43,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:43,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:22:43,824 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:43,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:43,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1464447499, now seen corresponding path program 2 times [2024-06-27 19:22:43,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:43,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76609237] [2024-06-27 19:22:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:43,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:43,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:43,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76609237] [2024-06-27 19:22:43,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76609237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:43,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:43,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:43,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928524206] [2024-06-27 19:22:43,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:43,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:43,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:43,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:43,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 540 transitions, 7173 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:43,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:43,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:43,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:45,160 INFO L124 PetriNetUnfolderBase]: 3652/6145 cut-off events. [2024-06-27 19:22:45,160 INFO L125 PetriNetUnfolderBase]: For 735043/735058 co-relation queries the response was YES. [2024-06-27 19:22:45,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 6145 events. 3652/6145 cut-off events. For 735043/735058 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41804 event pairs, 707 based on Foata normal form. 18/6157 useless extension candidates. Maximal degree in co-relation 45218. Up to 4538 conditions per place. [2024-06-27 19:22:45,234 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 457 selfloop transitions, 124 changer transitions 0/588 dead transitions. [2024-06-27 19:22:45,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 588 transitions, 9231 flow [2024-06-27 19:22:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:45,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-27 19:22:45,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-27 19:22:45,235 INFO L175 Difference]: Start difference. First operand has 427 places, 540 transitions, 7173 flow. Second operand 8 states and 195 transitions. [2024-06-27 19:22:45,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 588 transitions, 9231 flow [2024-06-27 19:22:49,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 588 transitions, 8909 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:22:49,118 INFO L231 Difference]: Finished difference. Result has 428 places, 548 transitions, 7247 flow [2024-06-27 19:22:49,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6869, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7247, PETRI_PLACES=428, PETRI_TRANSITIONS=548} [2024-06-27 19:22:49,119 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-27 19:22:49,119 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 548 transitions, 7247 flow [2024-06-27 19:22:49,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:49,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:49,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:49,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:22:49,120 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:49,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash -784341849, now seen corresponding path program 3 times [2024-06-27 19:22:49,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:49,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327685130] [2024-06-27 19:22:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:49,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:49,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327685130] [2024-06-27 19:22:49,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327685130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:49,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:49,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:22:49,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105729163] [2024-06-27 19:22:49,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:22:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:22:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:22:49,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:49,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 548 transitions, 7247 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:49,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:49,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:50,469 INFO L124 PetriNetUnfolderBase]: 3639/6122 cut-off events. [2024-06-27 19:22:50,469 INFO L125 PetriNetUnfolderBase]: For 719014/719029 co-relation queries the response was YES. [2024-06-27 19:22:50,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44788 conditions, 6122 events. 3639/6122 cut-off events. For 719014/719029 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 41547 event pairs, 705 based on Foata normal form. 18/6134 useless extension candidates. Maximal degree in co-relation 44599. Up to 4532 conditions per place. [2024-06-27 19:22:50,548 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 450 selfloop transitions, 128 changer transitions 0/585 dead transitions. [2024-06-27 19:22:50,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 585 transitions, 8952 flow [2024-06-27 19:22:50,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:22:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:22:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:22:50,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:22:50,549 INFO L175 Difference]: Start difference. First operand has 428 places, 548 transitions, 7247 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:22:50,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 585 transitions, 8952 flow [2024-06-27 19:22:54,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 585 transitions, 8753 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:22:54,726 INFO L231 Difference]: Finished difference. Result has 434 places, 551 transitions, 7363 flow [2024-06-27 19:22:54,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7048, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7363, PETRI_PLACES=434, PETRI_TRANSITIONS=551} [2024-06-27 19:22:54,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 19:22:54,727 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 551 transitions, 7363 flow [2024-06-27 19:22:54,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:54,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:22:54,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:22:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:22:54,727 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:22:54,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:22:54,728 INFO L85 PathProgramCache]: Analyzing trace with hash -784579185, now seen corresponding path program 3 times [2024-06-27 19:22:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:22:54,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676463970] [2024-06-27 19:22:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:22:54,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:22:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:22:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:22:54,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:22:54,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676463970] [2024-06-27 19:22:54,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676463970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:22:54,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:22:54,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:22:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446736269] [2024-06-27 19:22:54,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:22:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:22:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:22:54,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:22:54,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:22:54,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:22:54,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 551 transitions, 7363 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:22:54,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:22:54,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:22:54,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:22:56,269 INFO L124 PetriNetUnfolderBase]: 3692/6200 cut-off events. [2024-06-27 19:22:56,269 INFO L125 PetriNetUnfolderBase]: For 763773/763776 co-relation queries the response was YES. [2024-06-27 19:22:56,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 6200 events. 3692/6200 cut-off events. For 763773/763776 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42055 event pairs, 689 based on Foata normal form. 8/6196 useless extension candidates. Maximal degree in co-relation 45929. Up to 5031 conditions per place. [2024-06-27 19:22:56,348 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 156 changer transitions 0/595 dead transitions. [2024-06-27 19:22:56,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 595 transitions, 8921 flow [2024-06-27 19:22:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:22:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:22:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-27 19:22:56,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-27 19:22:56,349 INFO L175 Difference]: Start difference. First operand has 434 places, 551 transitions, 7363 flow. Second operand 10 states and 236 transitions. [2024-06-27 19:22:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 595 transitions, 8921 flow [2024-06-27 19:23:01,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 595 transitions, 8665 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:23:01,532 INFO L231 Difference]: Finished difference. Result has 441 places, 553 transitions, 7473 flow [2024-06-27 19:23:01,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7473, PETRI_PLACES=441, PETRI_TRANSITIONS=553} [2024-06-27 19:23:01,533 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-27 19:23:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 553 transitions, 7473 flow [2024-06-27 19:23:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:01,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:01,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:23:01,534 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 641648333, now seen corresponding path program 4 times [2024-06-27 19:23:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:01,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197576805] [2024-06-27 19:23:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:01,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:01,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197576805] [2024-06-27 19:23:01,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197576805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:01,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:01,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:01,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845414543] [2024-06-27 19:23:01,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:01,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:01,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:01,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:01,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:01,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:01,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 553 transitions, 7473 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:01,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:01,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:01,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:03,446 INFO L124 PetriNetUnfolderBase]: 3893/6516 cut-off events. [2024-06-27 19:23:03,446 INFO L125 PetriNetUnfolderBase]: For 968076/968076 co-relation queries the response was YES. [2024-06-27 19:23:03,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51298 conditions, 6516 events. 3893/6516 cut-off events. For 968076/968076 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 44565 event pairs, 1037 based on Foata normal form. 8/6496 useless extension candidates. Maximal degree in co-relation 51105. Up to 5041 conditions per place. [2024-06-27 19:23:03,607 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 271 selfloop transitions, 322 changer transitions 0/600 dead transitions. [2024-06-27 19:23:03,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 600 transitions, 9065 flow [2024-06-27 19:23:03,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 19:23:03,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 19:23:03,608 INFO L175 Difference]: Start difference. First operand has 441 places, 553 transitions, 7473 flow. Second operand 9 states and 230 transitions. [2024-06-27 19:23:03,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 600 transitions, 9065 flow [2024-06-27 19:23:08,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 600 transitions, 8733 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 19:23:08,598 INFO L231 Difference]: Finished difference. Result has 441 places, 555 transitions, 7835 flow [2024-06-27 19:23:08,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7835, PETRI_PLACES=441, PETRI_TRANSITIONS=555} [2024-06-27 19:23:08,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-27 19:23:08,598 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 555 transitions, 7835 flow [2024-06-27 19:23:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:08,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:08,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:08,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:23:08,598 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash 499545263, now seen corresponding path program 5 times [2024-06-27 19:23:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:08,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126274615] [2024-06-27 19:23:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:08,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:08,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:08,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126274615] [2024-06-27 19:23:08,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126274615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:08,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:08,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634107687] [2024-06-27 19:23:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:08,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:08,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:08,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:08,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:08,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:08,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 555 transitions, 7835 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:08,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:08,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:08,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:10,491 INFO L124 PetriNetUnfolderBase]: 4093/6856 cut-off events. [2024-06-27 19:23:10,491 INFO L125 PetriNetUnfolderBase]: For 1169173/1169173 co-relation queries the response was YES. [2024-06-27 19:23:10,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56885 conditions, 6856 events. 4093/6856 cut-off events. For 1169173/1169173 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47245 event pairs, 1058 based on Foata normal form. 6/6830 useless extension candidates. Maximal degree in co-relation 56694. Up to 4914 conditions per place. [2024-06-27 19:23:10,568 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 277 selfloop transitions, 325 changer transitions 0/609 dead transitions. [2024-06-27 19:23:10,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 609 transitions, 9709 flow [2024-06-27 19:23:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 19:23:10,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-06-27 19:23:10,569 INFO L175 Difference]: Start difference. First operand has 441 places, 555 transitions, 7835 flow. Second operand 9 states and 235 transitions. [2024-06-27 19:23:10,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 609 transitions, 9709 flow [2024-06-27 19:23:15,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 609 transitions, 9260 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:15,493 INFO L231 Difference]: Finished difference. Result has 446 places, 558 transitions, 8124 flow [2024-06-27 19:23:15,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7394, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8124, PETRI_PLACES=446, PETRI_TRANSITIONS=558} [2024-06-27 19:23:15,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2024-06-27 19:23:15,494 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 558 transitions, 8124 flow [2024-06-27 19:23:15,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:15,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:15,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:15,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:23:15,494 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:15,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:15,495 INFO L85 PathProgramCache]: Analyzing trace with hash 499665233, now seen corresponding path program 6 times [2024-06-27 19:23:15,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:15,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285176515] [2024-06-27 19:23:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:15,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:15,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:15,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285176515] [2024-06-27 19:23:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285176515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119347821] [2024-06-27 19:23:15,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:15,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:15,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 558 transitions, 8124 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:15,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:15,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:15,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:17,557 INFO L124 PetriNetUnfolderBase]: 4080/6831 cut-off events. [2024-06-27 19:23:17,558 INFO L125 PetriNetUnfolderBase]: For 1119212/1119215 co-relation queries the response was YES. [2024-06-27 19:23:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56594 conditions, 6831 events. 4080/6831 cut-off events. For 1119212/1119215 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47124 event pairs, 1111 based on Foata normal form. 8/6816 useless extension candidates. Maximal degree in co-relation 56400. Up to 6037 conditions per place. [2024-06-27 19:23:17,634 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 457 selfloop transitions, 133 changer transitions 0/597 dead transitions. [2024-06-27 19:23:17,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 597 transitions, 9428 flow [2024-06-27 19:23:17,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-27 19:23:17,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-27 19:23:17,635 INFO L175 Difference]: Start difference. First operand has 446 places, 558 transitions, 8124 flow. Second operand 9 states and 219 transitions. [2024-06-27 19:23:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 597 transitions, 9428 flow [2024-06-27 19:23:22,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 597 transitions, 8753 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 19:23:22,697 INFO L231 Difference]: Finished difference. Result has 447 places, 558 transitions, 7719 flow [2024-06-27 19:23:22,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7719, PETRI_PLACES=447, PETRI_TRANSITIONS=558} [2024-06-27 19:23:22,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 406 predicate places. [2024-06-27 19:23:22,697 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 558 transitions, 7719 flow [2024-06-27 19:23:22,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:22,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:22,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:22,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:23:22,697 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:22,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 650219213, now seen corresponding path program 7 times [2024-06-27 19:23:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:22,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178452547] [2024-06-27 19:23:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:22,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:22,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178452547] [2024-06-27 19:23:22,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178452547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:22,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:22,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109459685] [2024-06-27 19:23:22,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:22,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:22,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:22,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 558 transitions, 7719 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:22,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:22,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:24,693 INFO L124 PetriNetUnfolderBase]: 4108/6887 cut-off events. [2024-06-27 19:23:24,693 INFO L125 PetriNetUnfolderBase]: For 1147202/1147202 co-relation queries the response was YES. [2024-06-27 19:23:24,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56408 conditions, 6887 events. 4108/6887 cut-off events. For 1147202/1147202 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 47619 event pairs, 1180 based on Foata normal form. 8/6869 useless extension candidates. Maximal degree in co-relation 56215. Up to 5767 conditions per place. [2024-06-27 19:23:24,772 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 321 changer transitions 0/594 dead transitions. [2024-06-27 19:23:24,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 594 transitions, 9019 flow [2024-06-27 19:23:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-27 19:23:24,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-27 19:23:24,773 INFO L175 Difference]: Start difference. First operand has 447 places, 558 transitions, 7719 flow. Second operand 9 states and 221 transitions. [2024-06-27 19:23:24,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 594 transitions, 9019 flow [2024-06-27 19:23:30,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 594 transitions, 8749 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:23:30,525 INFO L231 Difference]: Finished difference. Result has 450 places, 559 transitions, 8118 flow [2024-06-27 19:23:30,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8118, PETRI_PLACES=450, PETRI_TRANSITIONS=559} [2024-06-27 19:23:30,525 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 409 predicate places. [2024-06-27 19:23:30,525 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 559 transitions, 8118 flow [2024-06-27 19:23:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:30,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:30,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:30,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:23:30,526 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:30,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1206785367, now seen corresponding path program 4 times [2024-06-27 19:23:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:30,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616664957] [2024-06-27 19:23:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616664957] [2024-06-27 19:23:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616664957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:30,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447317893] [2024-06-27 19:23:30,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:30,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:30,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 559 transitions, 8118 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:30,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:30,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:30,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:32,418 INFO L124 PetriNetUnfolderBase]: 4174/6998 cut-off events. [2024-06-27 19:23:32,418 INFO L125 PetriNetUnfolderBase]: For 1206368/1206383 co-relation queries the response was YES. [2024-06-27 19:23:32,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58441 conditions, 6998 events. 4174/6998 cut-off events. For 1206368/1206383 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 48519 event pairs, 1148 based on Foata normal form. 18/6999 useless extension candidates. Maximal degree in co-relation 58247. Up to 6109 conditions per place. [2024-06-27 19:23:32,502 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 476 selfloop transitions, 111 changer transitions 0/594 dead transitions. [2024-06-27 19:23:32,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 594 transitions, 9643 flow [2024-06-27 19:23:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-27 19:23:32,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 19:23:32,503 INFO L175 Difference]: Start difference. First operand has 450 places, 559 transitions, 8118 flow. Second operand 8 states and 192 transitions. [2024-06-27 19:23:32,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 594 transitions, 9643 flow [2024-06-27 19:23:37,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 594 transitions, 8996 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:37,053 INFO L231 Difference]: Finished difference. Result has 452 places, 561 transitions, 7760 flow [2024-06-27 19:23:37,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7760, PETRI_PLACES=452, PETRI_TRANSITIONS=561} [2024-06-27 19:23:37,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 19:23:37,053 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 561 transitions, 7760 flow [2024-06-27 19:23:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:37,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:37,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:23:37,054 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:37,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash -580329819, now seen corresponding path program 8 times [2024-06-27 19:23:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347014925] [2024-06-27 19:23:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:37,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347014925] [2024-06-27 19:23:37,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347014925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:37,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:37,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:37,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127241286] [2024-06-27 19:23:37,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:37,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:37,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:37,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:37,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:37,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:37,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 561 transitions, 7760 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:37,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:37,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:37,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:39,070 INFO L124 PetriNetUnfolderBase]: 4248/7124 cut-off events. [2024-06-27 19:23:39,070 INFO L125 PetriNetUnfolderBase]: For 1270635/1270638 co-relation queries the response was YES. [2024-06-27 19:23:39,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59825 conditions, 7124 events. 4248/7124 cut-off events. For 1270635/1270638 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 49487 event pairs, 1176 based on Foata normal form. 8/7120 useless extension candidates. Maximal degree in co-relation 59629. Up to 6308 conditions per place. [2024-06-27 19:23:39,153 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 461 selfloop transitions, 134 changer transitions 0/602 dead transitions. [2024-06-27 19:23:39,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 602 transitions, 9356 flow [2024-06-27 19:23:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:23:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:23:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-27 19:23:39,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-27 19:23:39,154 INFO L175 Difference]: Start difference. First operand has 452 places, 561 transitions, 7760 flow. Second operand 10 states and 234 transitions. [2024-06-27 19:23:39,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 602 transitions, 9356 flow [2024-06-27 19:23:44,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 602 transitions, 9149 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:23:44,707 INFO L231 Difference]: Finished difference. Result has 458 places, 565 transitions, 7915 flow [2024-06-27 19:23:44,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7915, PETRI_PLACES=458, PETRI_TRANSITIONS=565} [2024-06-27 19:23:44,708 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-27 19:23:44,708 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 565 transitions, 7915 flow [2024-06-27 19:23:44,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:44,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:44,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:23:44,709 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 470080199, now seen corresponding path program 5 times [2024-06-27 19:23:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:44,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696330335] [2024-06-27 19:23:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:44,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:44,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696330335] [2024-06-27 19:23:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696330335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:44,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:44,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:23:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017067761] [2024-06-27 19:23:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:23:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:23:44,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:23:44,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:44,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 565 transitions, 7915 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:44,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:44,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:44,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:46,685 INFO L124 PetriNetUnfolderBase]: 4276/7185 cut-off events. [2024-06-27 19:23:46,685 INFO L125 PetriNetUnfolderBase]: For 1307929/1307944 co-relation queries the response was YES. [2024-06-27 19:23:46,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60458 conditions, 7185 events. 4276/7185 cut-off events. For 1307929/1307944 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 50150 event pairs, 1201 based on Foata normal form. 20/7199 useless extension candidates. Maximal degree in co-relation 60260. Up to 6403 conditions per place. [2024-06-27 19:23:46,767 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 107 changer transitions 0/591 dead transitions. [2024-06-27 19:23:46,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 591 transitions, 9182 flow [2024-06-27 19:23:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:23:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:23:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:23:46,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:23:46,768 INFO L175 Difference]: Start difference. First operand has 458 places, 565 transitions, 7915 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:23:46,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 591 transitions, 9182 flow [2024-06-27 19:23:53,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 591 transitions, 8906 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:23:53,011 INFO L231 Difference]: Finished difference. Result has 459 places, 566 transitions, 7881 flow [2024-06-27 19:23:53,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7639, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7881, PETRI_PLACES=459, PETRI_TRANSITIONS=566} [2024-06-27 19:23:53,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-27 19:23:53,011 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 566 transitions, 7881 flow [2024-06-27 19:23:53,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:53,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:23:53,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:23:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:23:53,012 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:23:53,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:23:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1483516115, now seen corresponding path program 9 times [2024-06-27 19:23:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:23:53,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292437961] [2024-06-27 19:23:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:23:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:23:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:23:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:23:53,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:23:53,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292437961] [2024-06-27 19:23:53,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292437961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:23:53,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:23:53,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:23:53,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136558444] [2024-06-27 19:23:53,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:23:53,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:23:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:23:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:23:53,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:23:53,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:23:53,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 566 transitions, 7881 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:23:53,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:23:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:23:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:23:55,096 INFO L124 PetriNetUnfolderBase]: 4258/7142 cut-off events. [2024-06-27 19:23:55,097 INFO L125 PetriNetUnfolderBase]: For 1284173/1284176 co-relation queries the response was YES. [2024-06-27 19:23:55,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59527 conditions, 7142 events. 4258/7142 cut-off events. For 1284173/1284176 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 49715 event pairs, 1178 based on Foata normal form. 10/7140 useless extension candidates. Maximal degree in co-relation 59328. Up to 6374 conditions per place. [2024-06-27 19:23:55,189 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 460 selfloop transitions, 131 changer transitions 0/598 dead transitions. [2024-06-27 19:23:55,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 598 transitions, 9161 flow [2024-06-27 19:23:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:23:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:23:55,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-27 19:23:55,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-27 19:23:55,190 INFO L175 Difference]: Start difference. First operand has 459 places, 566 transitions, 7881 flow. Second operand 9 states and 213 transitions. [2024-06-27 19:23:55,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 598 transitions, 9161 flow [2024-06-27 19:24:00,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 598 transitions, 8930 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:00,648 INFO L231 Difference]: Finished difference. Result has 462 places, 566 transitions, 7917 flow [2024-06-27 19:24:00,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=462, PETRI_TRANSITIONS=566} [2024-06-27 19:24:00,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-27 19:24:00,649 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 566 transitions, 7917 flow [2024-06-27 19:24:00,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:00,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:00,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:00,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:24:00,649 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:00,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:00,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1199376057, now seen corresponding path program 6 times [2024-06-27 19:24:00,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:00,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822144302] [2024-06-27 19:24:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:00,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:00,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822144302] [2024-06-27 19:24:00,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822144302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:00,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:00,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621888347] [2024-06-27 19:24:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:00,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:00,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:00,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:00,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 566 transitions, 7917 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:00,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:00,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:00,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:02,464 INFO L124 PetriNetUnfolderBase]: 4278/7185 cut-off events. [2024-06-27 19:24:02,464 INFO L125 PetriNetUnfolderBase]: For 1296873/1296888 co-relation queries the response was YES. [2024-06-27 19:24:02,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59868 conditions, 7185 events. 4278/7185 cut-off events. For 1296873/1296888 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 50183 event pairs, 1187 based on Foata normal form. 18/7195 useless extension candidates. Maximal degree in co-relation 59668. Up to 6379 conditions per place. [2024-06-27 19:24:02,555 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 479 selfloop transitions, 109 changer transitions 0/595 dead transitions. [2024-06-27 19:24:02,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 595 transitions, 9210 flow [2024-06-27 19:24:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:02,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-27 19:24:02,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-27 19:24:02,753 INFO L175 Difference]: Start difference. First operand has 462 places, 566 transitions, 7917 flow. Second operand 8 states and 188 transitions. [2024-06-27 19:24:02,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 595 transitions, 9210 flow [2024-06-27 19:24:08,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 595 transitions, 8951 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:24:08,701 INFO L231 Difference]: Finished difference. Result has 463 places, 567 transitions, 7905 flow [2024-06-27 19:24:08,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7658, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7905, PETRI_PLACES=463, PETRI_TRANSITIONS=567} [2024-06-27 19:24:08,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 422 predicate places. [2024-06-27 19:24:08,702 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 567 transitions, 7905 flow [2024-06-27 19:24:08,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:08,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:08,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:24:08,702 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:08,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2041037765, now seen corresponding path program 7 times [2024-06-27 19:24:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801542977] [2024-06-27 19:24:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:08,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:08,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801542977] [2024-06-27 19:24:08,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801542977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:08,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:08,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185306933] [2024-06-27 19:24:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:08,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:08,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:08,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:08,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 567 transitions, 7905 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:08,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:08,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:08,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:10,671 INFO L124 PetriNetUnfolderBase]: 4567/7636 cut-off events. [2024-06-27 19:24:10,671 INFO L125 PetriNetUnfolderBase]: For 1576870/1576885 co-relation queries the response was YES. [2024-06-27 19:24:10,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67298 conditions, 7636 events. 4567/7636 cut-off events. For 1576870/1576885 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53570 event pairs, 1239 based on Foata normal form. 18/7642 useless extension candidates. Maximal degree in co-relation 67097. Up to 6421 conditions per place. [2024-06-27 19:24:10,768 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 483 selfloop transitions, 122 changer transitions 0/612 dead transitions. [2024-06-27 19:24:10,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 612 transitions, 9925 flow [2024-06-27 19:24:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:24:10,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:24:10,770 INFO L175 Difference]: Start difference. First operand has 463 places, 567 transitions, 7905 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:24:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 612 transitions, 9925 flow [2024-06-27 19:24:16,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 612 transitions, 9703 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:16,941 INFO L231 Difference]: Finished difference. Result has 467 places, 582 transitions, 8251 flow [2024-06-27 19:24:16,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7683, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8251, PETRI_PLACES=467, PETRI_TRANSITIONS=582} [2024-06-27 19:24:16,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 426 predicate places. [2024-06-27 19:24:16,942 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 582 transitions, 8251 flow [2024-06-27 19:24:16,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:16,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:16,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:16,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:24:16,942 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1461372997, now seen corresponding path program 8 times [2024-06-27 19:24:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226396953] [2024-06-27 19:24:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:17,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:17,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226396953] [2024-06-27 19:24:17,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226396953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:17,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:17,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:17,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331505942] [2024-06-27 19:24:17,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:17,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:17,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:17,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:17,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:17,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:17,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 582 transitions, 8251 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:17,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:18,953 INFO L124 PetriNetUnfolderBase]: 4549/7616 cut-off events. [2024-06-27 19:24:18,953 INFO L125 PetriNetUnfolderBase]: For 1569883/1569898 co-relation queries the response was YES. [2024-06-27 19:24:19,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66949 conditions, 7616 events. 4549/7616 cut-off events. For 1569883/1569898 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 53454 event pairs, 1274 based on Foata normal form. 20/7630 useless extension candidates. Maximal degree in co-relation 66746. Up to 6646 conditions per place. [2024-06-27 19:24:19,051 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 491 selfloop transitions, 111 changer transitions 0/609 dead transitions. [2024-06-27 19:24:19,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 609 transitions, 9773 flow [2024-06-27 19:24:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:24:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-27 19:24:19,052 INFO L175 Difference]: Start difference. First operand has 467 places, 582 transitions, 8251 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:24:19,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 609 transitions, 9773 flow [2024-06-27 19:24:25,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 609 transitions, 9632 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:24:25,644 INFO L231 Difference]: Finished difference. Result has 472 places, 582 transitions, 8336 flow [2024-06-27 19:24:25,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8336, PETRI_PLACES=472, PETRI_TRANSITIONS=582} [2024-06-27 19:24:25,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 431 predicate places. [2024-06-27 19:24:25,645 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 582 transitions, 8336 flow [2024-06-27 19:24:25,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:25,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:25,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:25,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:24:25,645 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:25,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:25,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1464229957, now seen corresponding path program 9 times [2024-06-27 19:24:25,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:25,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448944802] [2024-06-27 19:24:25,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:25,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:25,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448944802] [2024-06-27 19:24:25,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448944802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:25,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:25,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:25,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352482110] [2024-06-27 19:24:25,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:25,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:25,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:25,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:25,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:25,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 582 transitions, 8336 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:25,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:25,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:25,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:27,699 INFO L124 PetriNetUnfolderBase]: 4577/7660 cut-off events. [2024-06-27 19:24:27,699 INFO L125 PetriNetUnfolderBase]: For 1599696/1599711 co-relation queries the response was YES. [2024-06-27 19:24:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67758 conditions, 7660 events. 4577/7660 cut-off events. For 1599696/1599711 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 53864 event pairs, 1294 based on Foata normal form. 20/7674 useless extension candidates. Maximal degree in co-relation 67553. Up to 6870 conditions per place. [2024-06-27 19:24:27,794 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 490 selfloop transitions, 108 changer transitions 0/605 dead transitions. [2024-06-27 19:24:27,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 605 transitions, 9632 flow [2024-06-27 19:24:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-27 19:24:27,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-27 19:24:27,796 INFO L175 Difference]: Start difference. First operand has 472 places, 582 transitions, 8336 flow. Second operand 8 states and 182 transitions. [2024-06-27 19:24:27,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 605 transitions, 9632 flow [2024-06-27 19:24:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 605 transitions, 9409 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:24:34,774 INFO L231 Difference]: Finished difference. Result has 475 places, 583 transitions, 8366 flow [2024-06-27 19:24:34,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8116, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8366, PETRI_PLACES=475, PETRI_TRANSITIONS=583} [2024-06-27 19:24:34,775 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-27 19:24:34,775 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 583 transitions, 8366 flow [2024-06-27 19:24:34,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:34,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:34,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:24:34,775 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:34,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2040800429, now seen corresponding path program 10 times [2024-06-27 19:24:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381294718] [2024-06-27 19:24:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:34,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:34,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:34,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381294718] [2024-06-27 19:24:34,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381294718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:34,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:34,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198235488] [2024-06-27 19:24:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:34,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:34,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:34,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:34,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 583 transitions, 8366 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:34,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:34,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:34,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:37,029 INFO L124 PetriNetUnfolderBase]: 4722/7872 cut-off events. [2024-06-27 19:24:37,029 INFO L125 PetriNetUnfolderBase]: For 1755081/1755084 co-relation queries the response was YES. [2024-06-27 19:24:37,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71782 conditions, 7872 events. 4722/7872 cut-off events. For 1755081/1755084 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55301 event pairs, 1308 based on Foata normal form. 8/7858 useless extension candidates. Maximal degree in co-relation 71576. Up to 6846 conditions per place. [2024-06-27 19:24:37,134 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 463 selfloop transitions, 152 changer transitions 0/622 dead transitions. [2024-06-27 19:24:37,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 622 transitions, 10029 flow [2024-06-27 19:24:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-27 19:24:37,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-27 19:24:37,135 INFO L175 Difference]: Start difference. First operand has 475 places, 583 transitions, 8366 flow. Second operand 10 states and 231 transitions. [2024-06-27 19:24:37,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 622 transitions, 10029 flow [2024-06-27 19:24:44,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 622 transitions, 9804 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:44,332 INFO L231 Difference]: Finished difference. Result has 480 places, 587 transitions, 8576 flow [2024-06-27 19:24:44,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8141, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8576, PETRI_PLACES=480, PETRI_TRANSITIONS=587} [2024-06-27 19:24:44,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-27 19:24:44,332 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 587 transitions, 8576 flow [2024-06-27 19:24:44,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:44,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:44,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:24:44,333 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:44,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash -898504181, now seen corresponding path program 10 times [2024-06-27 19:24:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545784262] [2024-06-27 19:24:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:44,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:44,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545784262] [2024-06-27 19:24:44,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545784262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:44,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:44,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:24:44,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174880496] [2024-06-27 19:24:44,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:44,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:24:44,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:24:44,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:24:44,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 587 transitions, 8576 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:46,480 INFO L124 PetriNetUnfolderBase]: 4709/7866 cut-off events. [2024-06-27 19:24:46,480 INFO L125 PetriNetUnfolderBase]: For 1748961/1748976 co-relation queries the response was YES. [2024-06-27 19:24:46,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71602 conditions, 7866 events. 4709/7866 cut-off events. For 1748961/1748976 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 55405 event pairs, 1286 based on Foata normal form. 18/7872 useless extension candidates. Maximal degree in co-relation 71394. Up to 6646 conditions per place. [2024-06-27 19:24:46,581 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 490 selfloop transitions, 120 changer transitions 0/617 dead transitions. [2024-06-27 19:24:46,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 617 transitions, 10136 flow [2024-06-27 19:24:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:24:46,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:24:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-27 19:24:46,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-27 19:24:46,582 INFO L175 Difference]: Start difference. First operand has 480 places, 587 transitions, 8576 flow. Second operand 8 states and 189 transitions. [2024-06-27 19:24:46,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 617 transitions, 10136 flow [2024-06-27 19:24:51,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 617 transitions, 9837 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:24:51,971 INFO L231 Difference]: Finished difference. Result has 482 places, 587 transitions, 8521 flow [2024-06-27 19:24:51,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8277, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8521, PETRI_PLACES=482, PETRI_TRANSITIONS=587} [2024-06-27 19:24:51,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 441 predicate places. [2024-06-27 19:24:51,972 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 587 transitions, 8521 flow [2024-06-27 19:24:51,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:51,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:24:51,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:24:51,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:24:51,972 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:24:51,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:24:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1236150061, now seen corresponding path program 11 times [2024-06-27 19:24:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:24:51,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669329918] [2024-06-27 19:24:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:24:51,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:24:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:24:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:24:52,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:24:52,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669329918] [2024-06-27 19:24:52,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669329918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:24:52,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:24:52,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:24:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790115439] [2024-06-27 19:24:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:24:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:24:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:24:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:24:52,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:24:52,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:24:52,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 587 transitions, 8521 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:24:52,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:24:52,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:24:52,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:24:54,274 INFO L124 PetriNetUnfolderBase]: 4691/7833 cut-off events. [2024-06-27 19:24:54,274 INFO L125 PetriNetUnfolderBase]: For 1738589/1738592 co-relation queries the response was YES. [2024-06-27 19:24:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70685 conditions, 7833 events. 4691/7833 cut-off events. For 1738589/1738592 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55111 event pairs, 1309 based on Foata normal form. 10/7831 useless extension candidates. Maximal degree in co-relation 70476. Up to 7036 conditions per place. [2024-06-27 19:24:54,372 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 470 selfloop transitions, 140 changer transitions 0/617 dead transitions. [2024-06-27 19:24:54,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 617 transitions, 9833 flow [2024-06-27 19:24:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:24:54,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:24:54,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-27 19:24:54,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-27 19:24:54,373 INFO L175 Difference]: Start difference. First operand has 482 places, 587 transitions, 8521 flow. Second operand 10 states and 227 transitions. [2024-06-27 19:24:54,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 617 transitions, 9833 flow [2024-06-27 19:25:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 617 transitions, 9616 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:25:00,109 INFO L231 Difference]: Finished difference. Result has 487 places, 587 transitions, 8589 flow [2024-06-27 19:25:00,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8589, PETRI_PLACES=487, PETRI_TRANSITIONS=587} [2024-06-27 19:25:00,109 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-27 19:25:00,109 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 587 transitions, 8589 flow [2024-06-27 19:25:00,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:00,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:00,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:25:00,109 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:00,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash -332798733, now seen corresponding path program 11 times [2024-06-27 19:25:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:00,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212794606] [2024-06-27 19:25:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212794606] [2024-06-27 19:25:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212794606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:00,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:00,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:00,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746644774] [2024-06-27 19:25:00,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:00,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:00,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:00,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:00,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:00,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 587 transitions, 8589 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:00,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:00,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:00,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:02,428 INFO L124 PetriNetUnfolderBase]: 4673/7820 cut-off events. [2024-06-27 19:25:02,429 INFO L125 PetriNetUnfolderBase]: For 1715901/1715916 co-relation queries the response was YES. [2024-06-27 19:25:02,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69734 conditions, 7820 events. 4673/7820 cut-off events. For 1715901/1715916 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 55132 event pairs, 1314 based on Foata normal form. 20/7834 useless extension candidates. Maximal degree in co-relation 69524. Up to 7022 conditions per place. [2024-06-27 19:25:02,530 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 497 selfloop transitions, 105 changer transitions 0/609 dead transitions. [2024-06-27 19:25:02,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 609 transitions, 9863 flow [2024-06-27 19:25:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-27 19:25:02,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-27 19:25:02,531 INFO L175 Difference]: Start difference. First operand has 487 places, 587 transitions, 8589 flow. Second operand 8 states and 183 transitions. [2024-06-27 19:25:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 609 transitions, 9863 flow [2024-06-27 19:25:08,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 609 transitions, 9574 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:08,036 INFO L231 Difference]: Finished difference. Result has 487 places, 587 transitions, 8515 flow [2024-06-27 19:25:08,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8515, PETRI_PLACES=487, PETRI_TRANSITIONS=587} [2024-06-27 19:25:08,036 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-27 19:25:08,037 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 587 transitions, 8515 flow [2024-06-27 19:25:08,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:08,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:08,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:25:08,037 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1236002191, now seen corresponding path program 12 times [2024-06-27 19:25:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442957875] [2024-06-27 19:25:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442957875] [2024-06-27 19:25:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442957875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:08,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:08,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974767168] [2024-06-27 19:25:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:08,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:08,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:08,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:08,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 587 transitions, 8515 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:08,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:08,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:08,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:10,324 INFO L124 PetriNetUnfolderBase]: 4660/7786 cut-off events. [2024-06-27 19:25:10,324 INFO L125 PetriNetUnfolderBase]: For 1688945/1688948 co-relation queries the response was YES. [2024-06-27 19:25:10,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68989 conditions, 7786 events. 4660/7786 cut-off events. For 1688945/1688948 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 54827 event pairs, 1286 based on Foata normal form. 8/7780 useless extension candidates. Maximal degree in co-relation 68778. Up to 6961 conditions per place. [2024-06-27 19:25:10,425 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 471 selfloop transitions, 143 changer transitions 0/621 dead transitions. [2024-06-27 19:25:10,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 621 transitions, 9855 flow [2024-06-27 19:25:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:25:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:25:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-27 19:25:10,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613636363636364 [2024-06-27 19:25:10,426 INFO L175 Difference]: Start difference. First operand has 487 places, 587 transitions, 8515 flow. Second operand 11 states and 247 transitions. [2024-06-27 19:25:10,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 621 transitions, 9855 flow [2024-06-27 19:25:16,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 621 transitions, 9634 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:25:16,662 INFO L231 Difference]: Finished difference. Result has 492 places, 587 transitions, 8584 flow [2024-06-27 19:25:16,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8294, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8584, PETRI_PLACES=492, PETRI_TRANSITIONS=587} [2024-06-27 19:25:16,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-27 19:25:16,663 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 587 transitions, 8584 flow [2024-06-27 19:25:16,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:16,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:16,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:16,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:25:16,664 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:16,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -809938421, now seen corresponding path program 12 times [2024-06-27 19:25:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:16,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606190089] [2024-06-27 19:25:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606190089] [2024-06-27 19:25:16,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606190089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:16,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:16,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:25:16,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432830591] [2024-06-27 19:25:16,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:25:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:25:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:25:16,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:16,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 587 transitions, 8584 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:16,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:16,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:16,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:25:18,859 INFO L124 PetriNetUnfolderBase]: 4647/7784 cut-off events. [2024-06-27 19:25:18,859 INFO L125 PetriNetUnfolderBase]: For 1676008/1676023 co-relation queries the response was YES. [2024-06-27 19:25:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68430 conditions, 7784 events. 4647/7784 cut-off events. For 1676008/1676023 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 54904 event pairs, 1294 based on Foata normal form. 18/7794 useless extension candidates. Maximal degree in co-relation 68218. Up to 6922 conditions per place. [2024-06-27 19:25:18,955 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 497 selfloop transitions, 108 changer transitions 0/612 dead transitions. [2024-06-27 19:25:18,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 612 transitions, 9880 flow [2024-06-27 19:25:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:25:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:25:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-27 19:25:18,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-27 19:25:18,956 INFO L175 Difference]: Start difference. First operand has 492 places, 587 transitions, 8584 flow. Second operand 8 states and 185 transitions. [2024-06-27 19:25:18,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 612 transitions, 9880 flow [2024-06-27 19:25:24,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 612 transitions, 9584 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:25:24,099 INFO L231 Difference]: Finished difference. Result has 492 places, 587 transitions, 8508 flow [2024-06-27 19:25:24,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8288, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8508, PETRI_PLACES=492, PETRI_TRANSITIONS=587} [2024-06-27 19:25:24,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 451 predicate places. [2024-06-27 19:25:24,099 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 587 transitions, 8508 flow [2024-06-27 19:25:24,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:24,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:25:24,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:25:24,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:25:24,100 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:25:24,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:25:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1188599337, now seen corresponding path program 13 times [2024-06-27 19:25:24,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:25:24,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566619394] [2024-06-27 19:25:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:25:24,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:25:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:25:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:25:24,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:25:24,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566619394] [2024-06-27 19:25:24,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566619394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:25:24,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:25:24,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:25:24,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392293913] [2024-06-27 19:25:24,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:25:24,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:25:24,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:25:24,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:25:24,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:25:24,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-27 19:25:24,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 587 transitions, 8508 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:25:24,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:25:24,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-27 19:25:24,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand